MESON Chess Problem Database
Problem Display
PID: 63202 (n2BB3/2ppnN1r/Rq4kP/2R1Qp1p/5p1K/8/8/8 w - - 0 1)
Langstaff, William A
Grantham Journal, 1926
#2
8 + 10
| 81 | Chess | 1945 |
| 785 | Het Belgisch Schaakbord (L'Echiquier Belge) | 1957 |
| 5454 | Near Snap | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Qf6+
- 2.Rxf6#
- 2.Qxf6#
- 1...Rxh6
- 2.Sg5#
- 1...Rxf7
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...Rh8
- 2.Qg7#
- 1...Sc6
- 2.Qf6#
- 2.Qxf5#
- 1...Sc8
- 2.Qxf5#
- 1...Sg8
- 2.Qxf5#
- 1...c6
- 2.Qd6#
- 1...d6
- 2.Qe6#
- 1...Qf6+
- Tries
- 1.Sg5+?
- 1...Rf7
- 2.Qg7#
- 1...Kxh6!
- 1...Rf7
- 1.Sd6+?
- 1...Rf7
- 2.Qg7#
- 1...Kxh6!
- 1...Rf7
- 1.Bxe7?
- threat
- 2.Qxf5#
- 1...Qf6+
- 2.Rxf6#
- 2.Qxf6#
- 1...Rxh6
- 2.Sg5#
- 1...Rxf7
- 2.Qg7#
- 1...d5!
- threat
- 1.Rc2?
- threat
- 2.Rg2#
- 1...Qf6+
- 2.Rxf6#
- 2.Qxf6#
- 1...Rxh6
- 2.Sg5#
- 1...Rxf7
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...Rh8
- 2.Qg7#
- 1...f3!
- threat
- 1.Rc6+?
- 1...Sxc6
- 2.Qf6#
- 1...dxc6
- 2.Qe6#
- 1...d6
- 2.Qe6#
- 1...Qxc6!
- 1...Sxc6
- 1.Rxb6+?
- 1...Sc6
- 2.Qf6#
- 2.Qxf5#
- 1...cxb6
- 2.Qd6#
- 1...c6
- 2.Qd6#
- 1...d6
- 2.Qe6#
- 1...Sxb6!
- 1...Sc6
- 1.Sg5+?
- Keys
- 1.Rc1!
- threat
- 2.Rg1#
- 1...Qf6+
- 2.Rxf6#
- 2.Qxf6#
- 1...Rxh6
- 2.Sg5#
- 1...Rxf7
- 2.Qg7#
- 1...Rg7
- 2.Qxg7#
- 1...Rh8
- 2.Qg7#
- 1...Sc6
- 2.Qf6#
- 1...c6
- 2.Qd6#
- 1...d6
- 2.Qe6#
- threat
- 1.Rc1!
This anticipates 74497(1943)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(i);N_GUARD,SBLOCK,XP(E)::B(H)+S(F)
- R(i);N_GUARD,P_SPINR(i),XS(F)::QAR1(C)
- R(i);N_GUARD::QAR1(C),XR(i)
- R(i);N_GUARD::QAR1(C)
- S(h);N_GUARD::QAB1(C),XP(b)
- P(f);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR(C)
- P(g);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR2(C)
- Tries
- Try
- S(F);CHECK
- Vars
- R(i);P_SPINR(i)::QAR1(C)
- Refutation
- K(e);P-FLIGHT,XP(E)
- Try
- S(F);CHECK,N_PINQ(d)
- Vars
- R(i);P_SPINR(i)::QAR1(C)
- Refutation
- K(e);P-FLIGHT,XP(E)
- Try
- B(G);XS(h)
- Threat
- QAB1(C),XP(b)
- Vars
- R(i);N_GUARD,SBLOCK,XP(E)::B(H)+S(F)
- R(i);N_GUARD,P_SPINR(i),XS(F)::QAR1(C)
- Refutation
- P(g);
- Try
- R(B);
- Threat
- R(B)
- Vars
- R(i);N_GUARD,SBLOCK,XP(E)::B(H)+S(F)
- R(i);N_GUARD,P_SPINR(i),XS(F)::QAR1(C)
- R(i);N_GUARD::QAR1(C),XR(i)
- R(i);N_GUARD::QAR1(C)
- Refutation
- P(a);
- Try
- R(B);CHECK,N_PINQ(d)
- Vars
- S(h);XR(B)::QAR1(C)
- P(g);N_GUARD,XR(B)::QAR2(C)
- P(g);N_GUARD,P_SPINP(g)::QAR2(C)
- Refutation
- Q(d);P_SPINQ(d),XR(B)
- Try
- R(D);CHECK,XQ(d)
- Vars
- P(f);N_GUARD,XR(D)::QAR(C)
- P(f);N_GUARD,P_SPINP(f)::QAR(C)
- P(g);N_GUARD,P_SPINP(g)::QAR2(C)
- Refutation
- S(j);XR(D)
- Try
- Actual
- R(B);
- Threat
- R(B)
- Vars
- R(i);N_GUARD,SBLOCK,XP(E)::B(H)+S(F)
- R(i);N_GUARD,P_SPINR(i),XS(F)::QAR1(C)
- R(i);N_GUARD::QAR1(C),XR(i)
- R(i);N_GUARD::QAR1(C)
- S(h);N_SPINQ(d),S_CUTQ(d)::QAR1(C)
- P(f);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR(C)
- P(g);N_GUARD,N_SPINQ(d),S_CUTQ(d)::QAR2(C)
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