MESON Chess Problem Database
Problem Display
PID: 252348 (5b1B/1p1KNP1p/3p1P2/Q1P2p2/3k4/2R5/n1B1R3/n1N1r3 w - - 0 1)
Doukhan, Gerard
Best Problems, 2021
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Sxc2
- 2.Sb3#
- 1...Sb3
- 2.Sxb3#
- 1...Sxc1
- 2.Qb4#
- 1...Sxc3
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 1...dxc5
- 2.Qxc5#
- 1...d5
- 2.Sxf5#
- 1...Sxc2
- Tries
- 1.Kxd6?
- threat
- 2.Rd2#
- 1...Bxe7+
- 2.fxe7#
- 1...Rxe2
- 2.Sxe2#
- 1...Sxc2
- 2.Sb3#
- 1...Sxc1
- 2.Qb4#
- 1...Sxc3
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 1...Bh6
- 2.Sxf5#
- 1...Sb3
- 2.Sxb3#
- 1...Rd1!
- threat
- 1.Sc6+?
- 1...Kd5
- 2.Rd2#
- 1...bxc6!
- 1...Kd5
- 1.Bb3?
- threat
- 2.Sxf5#
- 2.Rd3#
- 2.Rc4#
- 1...Rxc1
- 2.Sxf5#
- 1...Bxe7
- 2.Rd3#
- 2.fxe7#
- 1...Sxb3
- 2.Sxb3#
- 1...Sxc1
- 2.Sxf5#
- 2.Qb4#
- 1...Sxc3
- 2.Sxf5#
- 2.Qb4#
- 1...Sb4
- 2.Rc4#
- 2.Qxb4#
- 1...Rd1
- 2.Sxf5#
- 2.Rc4#
- 1...Rf1
- 2.Rd3#
- 2.Rc4#
- 1...f4
- 2.Sf5#
- 2.Rd3#
- 2.Rc4#
- 1...d5
- 2.Sxf5#
- 2.Rd3#
- 1...b5
- 2.Sxf5#
- 2.Sc6#
- 1...Rxe2!
- threat
- 1.Qa4+?
- 1...Sb4
- 2.Qxb4#
- 1...Kxc3!
- 1...Sb4
- 1.cxd6?
- threat
- 2.Sxf5#
- 2.Rd2#
- 2.Qc5#
- 2.Qe5#
- 1...Rxe2
- 2.Sxe2#
- 2.Sxf5#
- 2.Qc5#
- 1...Bxe7
- 2.Rd2#
- 2.Qc5#
- 2.Qe5#
- 2.fxe7#
- 1...Sxc2
- 2.Sb3#
- 2.Sxf5#
- 2.Qc5#
- 2.Qe5#
- 1...Sxc1
- 2.Sxf5#
- 2.Qb4#
- 2.Qc5#
- 2.Qe5#
- 1...Sxc3
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 2.Qc5#
- 2.Qe5#
- 1...Rd1
- 2.Sxf5#
- 2.Qc5#
- 2.Qe5#
- 1...Rf1
- 2.Rd2#
- 2.Qc5#
- 2.Qe5#
- 1...Bh6
- 2.Sxf5#
- 2.Qc5#
- 2.Qe5#
- 1...Sb3
- 2.Sxb3#
- 2.Sxf5#
- 2.Qe5#
- 1...f4
- 2.Sf5#
- 2.Rd2#
- 2.Qc5#
- 2.Qe5#
- 1...b6
- 2.Sxf5#
- 2.Sc6#
- 2.Rd2#
- 2.Qe5#
- 1...b5!
- threat
- 1.c6?
- threat
- 2.Sxf5#
- 2.Rd2#
- 1...Rxe2
- 2.Sxe2#
- 2.Sxf5#
- 1...Bxe7
- 2.Rd2#
- 2.fxe7#
- 1...Sxc2
- 2.Sb3#
- 2.Sxf5#
- 1...Sxc1
- 2.Sxf5#
- 2.Qb4#
- 1...Sxc3
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 1...Rd1
- 2.Sxf5#
- 1...Rf1
- 2.Rd2#
- 1...Bh6
- 2.Sxf5#
- 1...Sb3
- 2.Sxb3#
- 2.Sxf5#
- 1...f4
- 2.Sf5#
- 2.Rd2#
- 1...d5
- 2.Sxf5#
- 2.Qc5#
- 1...b5!
- threat
- 1.Kxd6?
- Keys
- 1.Ke6!
- threat
- 2.Sxf5#
- 1...Rxe2+
- 2.Sxe2#
- 1...Bxe7
- 2.fxe7#
- 1...Sxc3
- 2.Qb4#
- 1...Sb4
- 2.Qxb4#
- 1...Rf1
- 2.Rd2#
- 1...f4
- 2.Sf5#
- threat
- 1.Ke6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- S(a);N_GUARD,XB(B)::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(c);N_GUARD,XS(A)::QAR2(E)
- S(c);N_GUARD,XR(D)::QAR2(E)
- S(c);N_GUARD::QAR2(E),XS(c)
- P(f);OGATE,XP(F)::QAB1(E),XP(f)
- P(f);SBLOCK::S(I),XP(e)
- Tries
- Try
- K(H);P-FLIGHT,P_SPINS(I),XP(f)
- Threat
- R(C)
- Vars
- B(i);CHECK,OGATE,XS(I)::B(K)+P(G),XB(i)
- R(b);XR(C)::S(A),XR(b)
- S(a);N_GUARD,XB(B)::S(A)
- S(c);N_GUARD,XS(A)::QAR2(E)
- S(c);N_GUARD,XR(D)::QAR2(E)
- S(c);N_GUARD::QAR2(E),XS(c)
- B(i);N_PINS(I)::S(I),XP(e)
- S(a);N_GUARD::S(A),XS(a)
- Refutation
- R(b);
- Try
- S(I);CHECK
- Vars
- K(d);P-FLIGHT::R(C)
- Refutation
- P(g);XS(I)
- Try
- B(B);
- Threat
- DUALS(3)
- Vars
- R(b);XS(A)::S(I),XP(e)
- S(a);XB(B)::S(A),XS(a)
- Refutation
- R(b);XR(C)
- Try
- Q(E);CHECK
- Vars
- S(c);N_GUARD,P_SPINS(c)::QAR2(E),XS(c)
- Refutation
- K(d);S_FLIGHT,XR(D)
- Try
- P(F);XP(f)
- Threat
- DUALS(4)
- Vars
- S(c);N_GUARD,XR(D)::QAR2(E)
- Refutation
- P(g);
- Try
- P(F);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD,XR(D)::QAR2(E)
- S(c);N_GUARD::QAR2(E),XS(c)
- R(b);::S(I),XP(e)
- R(b);::R(C)
- B(i);::S(I),XP(e)
- Refutation
- P(g);
- Try
- Actual
- K(H);P_SPINR(C),S_FLIGHT
- Threat
- S(I),XP(e)
- Vars
- R(b);CHECK,XR(C)::S(A),XR(b)
- B(i);OGATE,XS(I)::B(K)+P(G),XB(i)
- S(c);N_GUARD,XR(D)::QAR2(E)
- S(c);N_GUARD::QAR2(E),XS(c)
- R(b);N_PINR(C)::R(C)
- P(e);::S(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).