MESON Chess Problem Database
Problem Display
PID: 3021 (R2Q4/1NB4p/4p2P/1B1r1P1K/1p1kp3/6N1/1P3P2/2n5 w - - 0 1)
Bernard, Henry D'Oyly
Source?, 1917
#2
11 + 7
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Rxd8
- 2.Rxd8#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e3
- 2.Qh4#
- 1...exf5
- 2.Sxf5#
- 1...e5
- 2.Bb6#
- 1...Rd6
- Tries
- 1.Kg4?
- 1...exf5+
- 2.Sxf5#
- 1...Rxd8
- 2.Rxd8#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...e3!
- 1...exf5+
- 1.Kh4?
- 1...Rxd8
- 2.Rxd8#
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...e3!
- 1...Rxd8
- 1.Kg5?
- 1...Rxd8
- 2.Rxd8#
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...e3!
- 1...Rxd8
- 1.Ba6?
- 1...Rxd8
- 2.Rxd8#
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...e5
- 2.Bb6#
- 1...b3!
- 1...Rxd8
- 1.Bb8?
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Ba7#
- 1...Rxd8!
- 1...exf5
- 1.Ra1?
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 2.Rd1#
- 1...Se2
- 2.Sxe2#
- 2.Rd1#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...Rxd8!
- 1...exf5
- 1.Ra2?
- 1...Sxa2
- 2.Se2#
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...Rxd8!
- 1...Sxa2
- 1.Ra4?
- threat
- 2.Rxb4#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...Sa2
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...Rxd8!
- threat
- 1.Ra5?
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...Rxd8!
- 1...exf5
- 1.Ra6?
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...Rxd8!
- 1...exf5
- 1.Ra7?
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Bb6#
- 1...Rxd8!
- 1...exf5
- 1.Rb8?
- 1...Rxd8
- 2.Rxd8#
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...e5
- 2.Bb6#
- 1...b3!
- 1...Rxd8
- 1.Rc8?
- 1...Rxd8
- 2.Rxd8#
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.Qh4#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...e5
- 2.Bb6#
- 1...b3!
- 1...Rxd8
- 1.Qf6+?
- 1...Re5
- 2.Rd8#
- 2.Qxe5#
- 1...e5!
- 1...Re5
- 1.Qxd5+?
- 1...Kxd5
- 2.Rd8#
- 1...exd5!
- 1...Kxd5
- 1.Qd6?
- threat
- 2.Bb6#
- 2.Qxb4#
- 1...Sa2
- 2.Se2#
- 2.Bb6#
- 1...Sb3
- 2.Se2#
- 2.Qxb4#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Bb6#
- 2.Ra4#
- 2.Qb4#
- 1...Rxd6!
- threat
- 1.Qh8+?
- 1...Re5
- 2.Rd8#
- 2.Qxe5#
- 1...e5!
- 1...Re5
- 1.Kg4?
- Keys
- 1.Bf4!
- 1...Rxd8
- 2.Rxd8#
- 1...exf5
- 2.Sxf5#
- 1...Rd6
- 2.Qxd6#
- 1...Rd7
- 2.Qxd7#
- 1...e3
- 2.fxe3#
- 1...Sa2
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Sb3
- 2.Se2#
- 1...Sd3
- 2.Se2#
- 1...b3
- 2.Ra4#
- 1...e5
- 2.Be3#
- 1...Rxd8
- 1.Bf4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- R(e);N_PINP(E),N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(d);OGATEB::QAR(K)
- P(f);XP(E)::S(C),XP(f)
- P(f);N_PINP(E),SBLOCK::B(I)
- Tries
- Try
- K(F);N_SPINP(E),S_FLIGHT
- Vars
- P(f);CHECK,XP(E)::S(C),XP(f)
- R(e);N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- R(e);OGATEB::QAR2(K),XR(e)
- R(e);OGATEB::QAR(K),XR(e)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);SBLOCK::B(I)
- Refutation
- P(d);
- Try
- K(F);N_SPINP(E),P-FLIGHT
- Vars
- R(e);N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- P(f);XP(E)::S(C),XP(f)
- R(e);OGATEB::QAR2(K),XR(e)
- R(e);OGATEB::QAR(K),XR(e)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);SBLOCK::B(I)
- Refutation
- P(d);
- Try
- K(F);P-FLIGHT
- Vars
- R(e);N_PINP(E),N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- P(d);
- Try
- B(D);
- Vars
- R(e);N_PINP(E),N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- P(b);
- Try
- B(I);
- Vars
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- R(J);
- Vars
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- R(J);
- Vars
- S(a);N_GUARD,XR(J)::S(C)
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C),XS(a)
- S(a);N_GUARD::S(C)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- R(J);P_PINP(b)
- Threat
- R(J),XP(b)
- Vars
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- S(a);N_GUARD::S(C)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- R(J);
- Vars
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- R(J);
- Vars
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- R(J);
- Vars
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- R(J);
- Vars
- R(e);N_PINP(E),N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- P(b);
- Try
- R(J);
- Vars
- R(e);N_PINP(E),N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATEB::QAR(K)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(f);N_PINP(E),SBLOCK::B(I)
- Refutation
- P(b);
- Try
- Q(K);CHECK,N_PINR(e)
- Refutation
- P(f);N_PINP(E),P_SPINP(f)
- Try
- Q(K);CHECK,N_SPINP(E),XR(e)
- Vars
- K(c);P-FLIGHT,XQ(K)::R(J)
- Refutation
- P(f);XQ(K)
- Try
- Q(K);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::S(C)
- Refutation
- R(e);N_PINP(E),N_SPINR(e),XQ(K)
- Try
- Q(K);CHECK,N_PINR(e)
- Refutation
- P(f);N_PINP(E),P_SPINP(f)
- Try
- Actual
- B(I);
- Vars
- R(e);N_PINP(E),N_SPINR(e),OGATE,XQ(K)::R(J),XR(e)
- P(f);XP(E)::S(C),XP(f)
- R(e);N_PINP(E),OGATEB::QAR2(K),XR(e)
- R(e);N_PINP(E),OGATEB::QAR(K),XR(e)
- P(d);OGATE::P(B),XP(d)
- S(a);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XS(a)
- P(b);OGATEB::R(J)
- P(f);N_PINP(E),SBLOCK::B(I)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).