MESON Chess Problem Database
Problem Display
PID: 253050 (1b1R2K1/4N2p/2B2p2/Br2kP2/6P1/1r1bPn2/1NQ5/6n1 w - - 0 1)
Pepler, Alan
The Problemist, 1991
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...R3b4
- 2.Sxd3#
- 1...R5b4
- 2.Qc5#
- 1...Rc5
- 2.Qxc5#
- 1...Rb6
- 2.Qc5#
- 1...Rb7
- 2.Qc5#
- 1...Bf1
- 2.Qe4#
- 1...Bxc2
- 2.Sc4#
- 1...Be2
- 2.Qe4#
- 1...Bc4+
- 2.Sxc4#
- 1...Be4
- 2.Sc4#
- 2.Qxe4#
- 1...Bxf5
- 2.Qxf5#
- 1...Ba7
- 2.Bc7#
- 1...Bc7
- 2.Bxc7#
- 1...Se1
- 2.Qh2#
- 1...Sh2
- 2.Qxh2#
- 1...Sd4
- 2.Qh2#
- 1...Sh4
- 2.Qh2#
- 1...Sg5
- 2.Qh2#
- 1...h5
- 2.Sg6#
- 1...h6
- 2.Sg6#
- 1...R3b4
- Tries
- 1.Sc8?
- threat
- 2.Re8#
- 1...Bc4+
- 2.Sxc4#
- 1...Bxf5
- 2.Qxf5#
- 1...Rb7
- 2.Qc5#
- 1...Sd4
- 2.Qh2#
- 1...Sg5
- 2.Qh2#
- 1...Bd6!
- threat
- 1.Bc3+?
- 1...Sd4
- 2.Sxd3#
- 2.Bxd4#
- 2.Qh2#
- 1...Rxc3!
- 1...Sd4
- 1.Bxf3?
- threat
- 2.Sc6#
- 2.Qh2#
- 1...Bc4+
- 2.Sxc4#
- 1...Rxb2
- 2.Sc6#
- 2.Bc3#
- 2.Qc3#
- 1...Bxc2
- 2.Sc4#
- 2.Sc6#
- 1...Bxf5
- 2.Qxf5#
- 1...Rc3
- 2.Bxc3#
- 2.Qh2#
- 2.Qxc3#
- 1...R3b4
- 2.Sxd3#
- 2.Sc6#
- 1...R5b4
- 2.Sc6#
- 2.Rd5#
- 2.Qc5#
- 1...Rc5
- 2.Qh2#
- 2.Qxc5#
- 1...Rb6
- 2.Rd5#
- 2.Qh2#
- 2.Qc5#
- 1...Be2
- 2.Sc6#
- 2.Qe4#
- 1...Be4
- 2.Sc4#
- 2.Qxe4#
- 2.Qh2#
- 1...Se2
- 2.Sc6#
- 1...Sh3
- 2.Sc6#
- 1...Sxf3!
- threat
- 1.Qxd3?
- threat
- 2.Sc4#
- 2.Qe4#
- 1...Rxb2
- 2.Qe4#
- 1...Rxd3
- 2.Sxd3#
- 2.Sc4#
- 1...Rc3
- 2.Qe4#
- 1...R5b4
- 2.Rd5#
- 2.Qd5#
- 1...Rc5
- 2.Qe4#
- 1...Rd5
- 2.Sc4#
- 2.Rxd5#
- 2.Qxd5#
- 1...Sd2
- 2.Qd4#
- 1...Sg5
- 2.Sc4#
- 2.Qd4#
- 1...R3b4!
- threat
- 1.Qc3+?
- 1...Sd4
- 2.Sxd3#
- 2.Qxd4#
- 1...Rxc3!
- 1...Sd4
- 1.Qc4?
- threat
- 2.Qe6#
- 2.Qf4#
- 1...Bxc4+
- 2.Sxc4#
- 1...R3b4
- 2.Sxd3#
- 2.Qe6#
- 1...R5b4
- 2.Rd5#
- 2.Qd5#
- 2.Qe6#
- 2.Qc5#
- 1...Rd5
- 2.Rxd5#
- 2.Qxd5#
- 2.Qf4#
- 1...Be4
- 2.Qe6#
- 2.Qxe4#
- 1...Se2
- 2.Qe6#
- 1...Sh3
- 2.Qe6#
- 1...Sd4
- 2.Qxd4#
- 1...Sg5
- 2.Qd4#
- 2.Qf4#
- 1...Bxf5!
- threat
- 1.Sc8?
- Keys
- 1.Re8!
- threat
- 2.Sc8#
- 1...Bc4+
- 2.Sxc4#
- 1...Kd6
- 2.Sc8#
- 1...Bxf5
- 2.Sxf5#
- 1...Rb7
- 2.Qc5#
- 1...Bd6
- 2.Sg6#
- 1...Sd4
- 2.Qh2#
- 1...Sg5
- 2.Qh2#
- threat
- 1.Re8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 14
- Sets
- R(b);N_GUARD::S(A),XB(c)
- R(e);N_GUARD::QAR2(B)
- R(e);N_GUARD::QAR2(B),XR(e)
- B(c);OGATE::QAR1(B)
- B(c);N_GUARD,XQ(B)::S(A)
- B(c);CHECK,N_GUARD::S(A),XB(c)
- B(c);OGATE,XP(F)::QAR1(B),XB(c)
- B(i);N_GUARD::B(E)
- B(i);N_GUARD::B(E),XB(i)
- S(d);N_GUARD::QAB(B)
- S(d);N_GUARD::QAB(B),XS(d)
- P(h);N_GUARD::S(H)
- Tries
- Try
- S(H);
- Threat
- R(I)
- Vars
- B(c);CHECK,N_GUARD::S(A),XB(c)
- B(c);OGATE,XP(F)::QAR1(B),XB(c)
- R(e);N_GUARD::QAR2(B)
- S(d);N_GUARD::QAB(B)
- Refutation
- B(i);
- Try
- B(E);CHECK
- Refutation
- R(b);XB(E)
- Try
- B(G);XS(d)
- Threat
- DUALS(2)
- Vars
- B(c);CHECK,N_GUARD::S(A),XB(c)
- B(c);OGATE,XP(F)::QAR1(B),XB(c)
- S(a);::S(H)
- Refutation
- S(a);XB(G)
- Try
- Q(B);XB(c)
- Threat
- DUALS(2)
- Vars
- R(b);XS(A)::QAR1(B)
- R(b);::QAR1(B)
- R(e);::QAR1(B)
- S(d);N_GUARD::QAB1(B)
- Refutation
- R(b);
- Try
- Q(B);CHECK
- Refutation
- R(b);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(c);CHECK,XQ(B)::S(A),XB(c)
- S(a);::QAR1(B)
- S(d);N_GUARD::QAB1(B),XS(d)
- Refutation
- B(c);XP(F)
- Try
- Actual
- R(I);
- Threat
- R(I)+S(H)
- Vars
- B(c);CHECK,N_GUARD::S(A),XB(c)
- K(f);S_FLIGHT::S(H)
- B(c);XP(F)::R(I)+S(H),XB(c)
- R(e);N_GUARD::QAR2(B)
- B(i);SBLOCK::R(I)+S(H),DCHECK
- S(d);N_GUARD::QAB(B)
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).