MESON Chess Problem Database
Problem Display
PID: 8141 (8/8/2p5/1PR3B1/3Pk1n1/2r2N1p/2P2P1N/1Q4KB w - - 0 1)
Barnes, Barry Peter
Lewis, Robert Tony
Lewis, Sally
The Problemist, 1995
#2
11 + 5
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Qxc2#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rxf3
- 2.c3#
- 1...Rc4
- 2.c3#
- 1...Rxc5
- 2.c4#
- 1...Sxf2
- 2.Re5#
- 1...Sxh2
- 2.Re5#
- 1...Se3
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sf6
- 2.Re5#
- 1...Sh6
- 2.Re5#
- 1...Rxc2
- Tries
- 1.Sf1?
- threat
- 2.S1d2#
- 2.Sg3#
- 1...Rxc2
- 2.Qxc2#
- 1...Rxf3
- 2.c3#
- 1...Rxc5
- 2.c4#
- 1...Se5
- 2.Sg3#
- 2.Rxe5#
- 1...Rd3
- 2.Sg3#
- 2.cxd3#
- 1...h2+!
- threat
- 1.Sxg4?
- threat
- 2.Sf6#
- 2.Re5#
- 1...Rxc2
- 2.Qxc2#
- 1...Rxf3
- 2.c3#
- 1...Rxc5
- 2.c4#
- 1...h2+!
- threat
- 1.Se1+?
- 1...Rf3
- 2.c3#
- 1...Kxd4!
- 1...Rf3
- 1.Sh4+?
- 1...Rf3
- 2.c3#
- 1...Kxd4!
- 1...Rf3
- 1.Qe1+?
- 1...Se3
- 2.Re5#
- 1...Re3!
- 1...Se3
- 1.Qb2?
- 1...Rxc2
- 2.Se1#
- 2.Qxc2#
- 1...Rxf3
- 2.Bxf3#
- 1...Rxc5
- 2.Sh4#
- 1...Sxf2
- 2.Re5#
- 1...Sxh2
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Re3
- 2.Sd2#
- 1...Ra3
- 2.Sd2#
- 1...Rb3
- 2.Sd2#
- 1...Rd3
- 2.Sd2#
- 1...Rc4
- 2.Se1#
- 2.Sd2#
- 2.Sh4#
- 1...Se3
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sh6
- 2.Re5#
- 1...cxb5!
- 1...Rxc2
- 1.Qb4?
- threat
- 2.Sd2#
- 1...Rxc2
- 2.Se1#
- 1...Rxf3
- 2.Bxf3#
- 1...Rxc5
- 2.Sh4#
- 1...Se5
- 2.Rxe5#
- 1...Rc4!
- threat
- 1.bxc6?
- 1...Rxc2
- 2.Qxc2#
- 1...Rxf3
- 2.c3#
- 1...Rxc5
- 2.c4#
- 1...Sxf2
- 2.Re5#
- 1...Sxh2
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Se3
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sh6
- 2.Re5#
- 1...Re3!
- 1...Rxc2
- 1.b6?
- 1...Rxc2
- 2.Qxc2#
- 1...Rxf3
- 2.c3#
- 1...Rxc5
- 2.c4#
- 1...Sxf2
- 2.Re5#
- 1...Sxh2
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Rc4
- 2.c3#
- 1...Se3
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sh6
- 2.Re5#
- 1...Re3!
- 1...Rxc2
- 1.Sf1?
- Keys
- 1.Qa1!
- 1...Rxc2
- 2.Se1#
- 1...Rxf3
- 2.Bxf3#
- 1...Rxc5
- 2.Sh4#
- 1...Sxf2
- 2.Re5#
- 1...Sxh2
- 2.Re5#
- 1...cxb5
- 2.Qa8#
- 1...Se5
- 2.Rxe5#
- 1...Ra3
- 2.Sd2#
- 1...Rb3
- 2.Sd2#
- 1...Rd3
- 2.Sd2#
- 1...Re3
- 2.Sd2#
- 1...Rc4
- 2.Se1#
- 2.Sd2#
- 2.Sh4#
- 1...Se3
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sh6
- 2.Re5#
- 1...Rxc2
- 1.Qa1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 6
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(a);OGATE,P_SPINR(a),XP(D)::QAB(A),XR(a)
- R(a);OGATE::QAB(A)+P(D)
- R(a);OGATE::QAB(A)+P(D),XR(a)
- R(a);OGATE::P(D),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::QAB(A)+P(D)
- R(a);OGATE,XR(J)::QAB(A)+P(D)
- S(d);N_GUARD,XP(E)::R1(J)
- S(d);N_GUARD,XS(F)::R1(J)
- S(d);N_GUARD::R1(J)
- S(d);N_GUARD::R1(J),XS(d)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(a);OGATE,P_SPINR(a),XP(D)::QAB(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::QAB(A)+P(D)
- R(a);OGATE,XR(J)::QAB(A)+P(D)
- Refutation
- P(b);CHECK
- Try
- S(F);XS(d)
- Threat
- DUALS(2)
- Vars
- R(a);OGATE,P_SPINR(a),XP(D)::QAB(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::QAB(A)+P(D)
- R(a);OGATE,XR(J)::QAB(A)+P(D)
- Refutation
- P(b);CHECK
- Try
- S(G);CHECK
- Vars
- R(a);OGATE,P_SPINR(a)::QAB(A)+P(D)
- Refutation
- K(c);P-FLIGHT,XP(H)
- Try
- S(G);CHECK
- Vars
- R(a);OGATE,P_SPINR(a)::QAB(A)+P(D)
- Refutation
- K(c);P-FLIGHT,XP(H)
- Try
- Q(A);CHECK
- Vars
- S(d);P_SPINS(d)::R1(J)
- Refutation
- R(a);P_SPINR(a)
- Try
- Q(A);
- Vars
- R(a);OGATE,P_SPINR(a),XS(G)::B(C),XR(a)
- R(a);N_GUARD,XR(J)::B(C)+S(G)
- S(d);N_GUARD,XP(E)::R1(J)
- S(d);N_GUARD,XS(F)::R1(J)
- S(d);N_GUARD::R1(J),XS(d)
- R(a);::B(C)+S(G),DCHECK
- S(d);N_GUARD::R1(J)
- Refutation
- P(e);XP(I)
- Try
- Q(A);
- Threat
- B(C)+S(G),DCHECK
- Vars
- R(a);N_GUARD,XP(D)::B(C)+S(G)
- R(a);OGATE,P_SPINR(a),XS(G)::B(C),XR(a)
- R(a);N_GUARD,XR(J)::B(C)+S(G)
- S(d);N_GUARD::R1(J),XS(d)
- Refutation
- R(a);
- Try
- P(I);XP(e)
- Vars
- R(a);OGATE,P_SPINR(a),XP(D)::QAB(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::QAB(A)+P(D)
- R(a);OGATE,XR(J)::QAB(A)+P(D)
- S(d);N_GUARD,XP(E)::R1(J)
- S(d);N_GUARD,XS(F)::R1(J)
- S(d);N_GUARD::R1(J),XS(d)
- R(a);OGATE::QAB(A)+P(D)
- R(a);OGATE::QAB(A)+P(D),XR(a)
- R(a);OGATE::P(D),XR(a)
- S(d);N_GUARD::R1(J)
- Refutation
- R(a);
- Try
- P(I);
- Vars
- R(a);OGATE,P_SPINR(a),XP(D)::QAB(A),XR(a)
- R(a);OGATE,P_SPINR(a),XS(G)::QAB(A)+P(D)
- R(a);OGATE,XR(J)::QAB(A)+P(D)
- S(d);N_GUARD,XP(E)::R1(J)
- S(d);N_GUARD,XS(F)::R1(J)
- S(d);N_GUARD::R1(J),XS(d)
- R(a);OGATE::QAB(A)+P(D)
- R(a);OGATE::QAB(A)+P(D),XR(a)
- R(a);OGATE::P(D),XR(a)
- S(d);N_GUARD::R1(J)
- Refutation
- R(a);
- Try
- Actual
- Q(A);
- Vars
- R(a);N_GUARD,XP(D)::B(C)+S(G)
- R(a);OGATE,P_SPINR(a),XS(G)::B(C),XR(a)
- R(a);N_GUARD,XR(J)::B(C)+S(G)
- S(d);N_GUARD,XP(E)::R1(J)
- S(d);N_GUARD,XS(F)::R1(J)
- P(e);OGATEB,XP(I)::QAB(A)
- S(d);N_GUARD::R1(J),XS(d)
- R(a);::B(C)+S(G),DCHECK
- S(d);N_GUARD::R1(J)
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