MESON Chess Problem Database
Problem Display
PID: 195895 (8/8/1p3p2/1K1p1B2/4pp2/2pkPQ2/R2p1P2/5bN1 w - - 0 1)
Holroyd, GC
The Observer, 1942
(First published on Sun Jul 19 1942)
#2
7 + 9
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Be2
- 2.Qxe2#
- 1...Bg2
- 2.Qe2#
- 1...Bh3
- 2.Qe2#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...c2
- 2.Ra3#
- 1...fxe3
- 2.Qxe3#
- 1...d4
- 2.Bxe4#
- 2.Qxe4#
- 2.exf4#
- 1...Be2
- Tries
- 1.Kb4?
- 1...fxe3
- 2.Qxe3#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Be2
- 2.Qxe2#
- 1...Bg2
- 2.Qe2#
- 1...Bh3
- 2.Qe2#
- 1...c2
- 2.Ra3#
- 1...d4
- 2.Bxe4#
- 2.Qxe4#
- 2.exf4#
- 1...b5!
- 1...fxe3
- 1.Se2?
- threat
- 2.Sxf4#
- 2.exf4#
- 1...fxe3
- 2.Qxe3#
- 1...d1S
- 2.Sc1#
- 2.Sxf4#
- 1...Bg2
- 2.Sxf4#
- 1...c2
- 2.Ra3#
- 2.exf4#
- 1...Bxe2!
- threat
- 1.Sh3?
- threat
- 2.Sxf4#
- 1...fxe3
- 2.Qxe3#
- 1...c2
- 2.Ra3#
- 1...Bxh3!
- threat
- 1.Be6?
- 1...exf3
- 2.Bf5#
- 1...fxe3
- 2.Qxe3#
- 1...c2
- 2.Ra3#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Be2
- 2.Qxe2#
- 1...Bg2
- 2.Qe2#
- 1...Bh3
- 2.Qe2#
- 1...d4
- 2.Bc4#
- 1...f5!
- 1...exf3
- 1.Bg6?
- 1...fxe3
- 2.Qxe3#
- 1...c2
- 2.Ra3#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Be2
- 2.Qxe2#
- 1...Bg2
- 2.Qe2#
- 1...Bh3
- 2.Qe2#
- 1...d4
- 2.Bxe4#
- 2.Qxe4#
- 2.exf4#
- 1...f5!
- 1...fxe3
- 1.Bh7?
- 1...fxe3
- 2.Qxe3#
- 1...c2
- 2.Ra3#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Be2
- 2.Qxe2#
- 1...Bg2
- 2.Qe2#
- 1...Bh3
- 2.Qe2#
- 1...d4
- 2.Bxe4#
- 2.Qxe4#
- 2.exf4#
- 1...f5!
- 1...fxe3
- 1.Rb2?
- 1...fxe3
- 2.Qxe3#
- 1...c2
- 2.Rb3#
- 1...d1Q
- 2.Qxd1#
- 1...d1S
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Be2
- 2.Qxe2#
- 1...Bg2
- 2.Qe2#
- 1...Bh3
- 2.Qe2#
- 1...d4
- 2.Bxe4#
- 2.Qxe4#
- 2.exf4#
- 1...cxb2!
- 1...fxe3
- 1.Qd1?
- threat
- 2.Qc2#
- 2.Qxf1#
- 1...c2
- 2.Ra3#
- 2.Qxc2#
- 1...Be2
- 2.Qc2#
- 2.Qxe2#
- 1...Bg2
- 2.Qc2#
- 2.Qe2#
- 1...Bh3
- 2.Qc2#
- 2.Qe2#
- 1...fxe3!
- threat
- 1.Kb4?
- Keys
- 1.Bh3!
- threat
- 2.Bxf1#
- 1...Bxh3
- 2.Qe2#
- 1...exf3
- 2.Bf5#
- 1...fxe3
- 2.Qxe3#
- 1...c2
- 2.Ra3#
- 1...d1Q
- 2.Qxd1#
- 1...d1B
- 2.Qxd1#
- 1...d1R
- 2.Qxd1#
- 1...Be2
- 2.Qxe2#
- 1...Bg2
- 2.Qe2#
- threat
- 1.Bh3!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- B(a);N_GUARD::QAB1(E),XB(a)
- B(a);N_GUARD::QAB1(E)
- P(b);OGATEB::QAR2(E),XQ(b)
- P(b);OGATEB::QAR2(E),XS(b)
- P(b);OGATEB::QAR2(E),XB(b)
- P(b);OGATEB::QAR2(E),XR(b)
- P(c);OGATEB,SBLOCK::R(B)
- P(f);N_SPINP(e),OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- Tries
- Try
- K(F);P-FLIGHT
- Vars
- P(f);N_SPINP(e),OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- P(b);OGATEB::QAR2(E),XQ(b)
- P(b);OGATEB::QAR2(E),XS(b)
- P(b);OGATEB::QAR2(E),XB(b)
- P(b);OGATEB::QAR2(E),XR(b)
- B(a);N_GUARD::QAB1(E),XB(a)
- B(a);N_GUARD::QAB1(E)
- P(c);OGATEB,SBLOCK::R(B)
- Refutation
- P(h);
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- P(f);N_SPINP(e),OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- B(a);::S(A),XP(f)
- Refutation
- B(a);XS(A)
- Try
- S(A);
- Threat
- S(A),XP(f)
- Vars
- P(f);N_SPINP(e),OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- P(c);OGATEB,SBLOCK::R(B)
- Refutation
- B(a);XS(A)
- Try
- B(G);N_PINP(e)
- Vars
- P(e);OGATEB,XQ(E)::B(G)
- P(f);OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- P(c);OGATEB,SBLOCK::R(B)
- P(b);OGATEB::QAR2(E),XQ(b)
- P(b);OGATEB::QAR2(E),XS(b)
- P(b);OGATEB::QAR2(E),XB(b)
- P(b);OGATEB::QAR2(E),XR(b)
- B(a);N_GUARD::QAB1(E),XB(a)
- B(a);N_GUARD::QAB1(E)
- P(g);OGATE::B(G)
- Refutation
- P(i);
- Try
- B(G);
- Vars
- P(f);N_SPINP(e),OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- P(c);OGATEB,SBLOCK::R(B)
- P(b);OGATEB::QAR2(E),XQ(b)
- P(b);OGATEB::QAR2(E),XS(b)
- P(b);OGATEB::QAR2(E),XB(b)
- P(b);OGATEB::QAR2(E),XR(b)
- B(a);N_GUARD::QAB1(E),XB(a)
- B(a);N_GUARD::QAB1(E)
- Refutation
- P(i);N_SPINP(e)
- Try
- B(G);
- Vars
- P(f);N_SPINP(e),OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- P(c);OGATEB,SBLOCK::R(B)
- P(b);OGATEB::QAR2(E),XQ(b)
- P(b);OGATEB::QAR2(E),XS(b)
- P(b);OGATEB::QAR2(E),XB(b)
- P(b);OGATEB::QAR2(E),XR(b)
- B(a);N_GUARD::QAB1(E),XB(a)
- B(a);N_GUARD::QAB1(E)
- Refutation
- P(i);N_SPINP(e)
- Try
- R(B);
- Vars
- P(f);N_SPINP(e),OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- P(c);OGATEB,SBLOCK::R(B)
- P(b);OGATEB::QAR2(E),XQ(b)
- P(b);OGATEB::QAR2(E),XS(b)
- P(b);OGATEB::QAR2(E),XB(b)
- P(b);OGATEB::QAR2(E),XR(b)
- B(a);N_GUARD::QAB1(E),XB(a)
- B(a);N_GUARD::QAB1(E)
- Refutation
- P(c);XR(B)
- Try
- Q(E);N_PINP(e),P_PINP(b)
- Threat
- DUALS(2)
- Refutation
- P(f);XP(D)
- Try
- Actual
- B(G);N_PINP(e)
- Threat
- B(G),XB(a)
- Vars
- B(a);N_GUARD,XB(G)::QAB1(E)
- P(e);OGATEB,XQ(E)::B(G)
- P(f);OGATE,P_SPINP(f),XP(D)::QAR1(E),XP(f)
- P(c);OGATEB,SBLOCK::R(B)
- P(b);OGATEB::QAR2(E),XQ(b)
- P(b);OGATEB::QAR2(E),XB(b)
- P(b);OGATEB::QAR2(E),XR(b)
- B(a);N_GUARD::QAB1(E),XB(a)
- B(a);N_GUARD::QAB1(E)
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).