MESON Chess Problem Database
Problem Display
PID: 159599 (Q5B1/K1B1pr2/1PRP2Nb/R1Nk4/4rq2/1PP2n2/8/8 w - - 0 1)
Tomson, Brian
4th Prize, Problem Observer, 1980
#2
12 + 7
| 15561 | Fifty Chess Problems (Brian Tomson) | 1983 |
SOLUTION
- SOUND
- Sets
- 1...Qxd6
- 2.Rxd6#
- 1...Sd4
- 2.c4#
- 1...Se5
- 2.Sxe7#
- 1...exd6
- 2.Rxd6#
- 1...e5
- 2.Se7#
- 1...e6
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Sd7#
- 1...Qxd6
- Tries
- 1.Sxe4+?
- 1...Ke6
- 2.Qc8#
- 1...Kxe4!
- 1...Ke6
- 1.Sb7+?
- 1...Kxc6
- 2.Sc5#
- 2.Qe8#
- 1...Ke6!
- 1...Kxc6
- 1.Sxe7+?
- 1...Ke5
- 2.d7#
- 1...Rxe7!
- 1...Ke5
- 1.Bxf7+?
- 1...Re6
- 2.Bxe6#
- 1...e6
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Sxe6#
- 2.Sd7#
- 1...Qxf7!
- 1...Re6
- 1.dxe7?
- threat
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sd7#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Rxe7
- 2.Sxe7#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Qe3
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Qd6
- 2.Rxd6#
- 1...Qf6
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sd7#
- 2.Rd6#
- 2.Re6#
- 2.Rxf6#
- 1...Re1
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Re2
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Re3
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Ra4
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Rb4
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Rc4
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Rd4
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Re5
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Re6
- 2.Rd6#
- 2.Rxe6#
- 1...Sd4
- 2.Rd6#
- 2.c4#
- 1...Se5
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sd7#
- 2.Rd6#
- 1...Qxc7+!
- threat
- 1.d7?
- threat
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Qe3
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.d8Q#
- 2.d8R#
- 1...Qd6
- 2.Rxd6#
- 1...Qf6
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Rd6#
- 2.Re6#
- 2.Rxf6#
- 1...Re1
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Re2
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Re3
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Ra4
- 2.Sxe7#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Rb4
- 2.Sxe7#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Rc4
- 2.Sxe7#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Rd4
- 2.Sxe7#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 1...Re5
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.d8Q#
- 2.d8R#
- 1...Re6
- 2.Rd6#
- 2.Rxe6#
- 1...Sd4
- 2.Rd6#
- 2.c4#
- 1...Se5
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sxe7#
- 2.Rd6#
- 1...e6
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Sxe6#
- 2.Rd6#
- 2.Rxe6#
- 1...Qxc7+!
- threat
- 1.Sxe4+?
- Keys
- 1.Bb8!
- threat
- 2.Rc8#
- 1...exd6+
- 2.Rc7#
- 1...e5+
- 2.Se7#
- 1...e6+
- 2.Sd7#
- 1...Qxd6
- 2.Rxd6#
- 1...Sd4
- 2.c4#
- 1...Se5
- 2.Sxe7#
- threat
- 1.Bb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(c);OGATE,XP(G)::QAB(K)+R(F),DCHECK,XQ(c)
- S(a);SBLOCK,S_CUTR(b)::P(B)
- S(a);SBLOCK,S_CUTR(b)::S(H),XP(f)
- P(f);OGATE,P_PINB(J),XP(G)::QAB(K)+R(F),DCHECK,XP(f)
- P(f);P_PINB(J),SBLOCK,S_CUTR(b)::S(H)
- Tries
- Try
- S(D);CHECK,XR(b)
- Vars
- K(d);S_FLIGHT::QAB(K)
- Refutation
- K(d);N_SPINR(g),S_FLIGHT,XS(D)
- Try
- S(D);CHECK
- Refutation
- K(d);S_FLIGHT
- Try
- S(H);CHECK,XP(f)
- Vars
- K(d);N_SPINR(g),P-FLIGHT::B(J)+P(G)
- Refutation
- R(b);P_PINB(J),XS(H)
- Try
- B(L);CHECK,XR(g)
- Vars
- R(b);N_GUARD,P_SPINR(b)::B(L),XR(b)
- Refutation
- Q(c);XB(L)
- Try
- P(G);XP(f)
- Threat
- DUALS(8)
- Vars
- Q(c);::QAB(K)+R(F),DCHECK,XQ(c)
- Refutation
- Q(c);CHECK,XB(J)
- Try
- P(G);
- Threat
- DUALS(7)
- Vars
- Q(c);::QAB(K)+R(F),DCHECK,XQ(c)
- Refutation
- Q(c);CHECK,XB(J)
- Try
- Actual
- B(J);
- Threat
- QAB(K)+R(F)
- Vars
- P(f);CHECK,SBLOCK,XP(G)::QAB(K)+R(F)
- P(f);CHECK,SBLOCK,S_CUTR(b)::S(H)
- P(f);CHECK,N_SPINR(g),SBLOCK::R(C)+S(D)
- Q(c);OGATE,XP(G)::QAB(K)+R(F),DCHECK,XQ(c)
- S(a);SBLOCK,S_CUTR(b)::P(B)
- S(a);SBLOCK,S_CUTR(b)::S(H),XP(f)
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