MESON Chess Problem Database
Problem Display
PID: 322 (8/8/4p2p/pP2p2R/Pn2k1n1/1KQ1Br2/1N5p/7B w - - 0 1)
Penrose, Lionel Sharples
The Observer, 1923
#2
8 + 9
| 887 | Mate in Two Moves | 1931 |
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Qd4#
- 1...Sa2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sd5
- 2.Qd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sxe3
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Kd5
- Tries
- 1.Ka3?
- 1...Kd5
- 2.Qd4#
- 1...Sxe3
- 2.Qxe5#
- 1...Sd3
- 2.Qxd3#
- 1...Sa2
- 2.Qd3#
- 1...Sd5
- 2.Qd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sc2+!
- 1...Kd5
- 1.Kc4?
- 1...Sd3
- 2.Qxd3#
- 1...Sa2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd5
- 2.Qd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sxe3+!
- 1...Sd3
- 1.Bc1?
- threat
- 2.Bxf3#
- 1...Se3
- 2.Qxe5#
- 1...Sd3
- 2.Qxd3#
- 2.Qc4#
- 1...Kd5!
- threat
- 1.Bd2?
- threat
- 2.Bxf3#
- 1...Se3
- 2.Qxe5#
- 1...Sd3
- 2.Qxd3#
- 2.Qc4#
- 1...Kd5!
- threat
- 1.Bb6?
- threat
- 2.Qxf3#
- 1...Kf4
- 2.Qxf3#
- 1...Sd3
- 2.Qc4#
- 1...Se3
- 2.Qxe5#
- 1...Kd5!
- threat
- 1.Ba7?
- threat
- 2.Qxf3#
- 1...Kf4
- 2.Qxf3#
- 1...Sd3
- 2.Qc4#
- 1...Se3
- 2.Qxe5#
- 1...Kd5!
- threat
- 1.b6?
- 1...Sxe3
- 2.Qxe5#
- 1...Sd3
- 2.Qxd3#
- 1...Sa2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd5
- 2.Qd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Kd5!
- 1...Sxe3
- 1.Ka3?
- Keys
- 1.Bc5!
- threat
- 2.Qxf3#
- 1...Kf4
- 2.Qxf3#
- 1...Kd5
- 2.Bxf3#
- 1...Sd3
- 2.Qc4#
- 1...Se3
- 2.Qxe5#
- threat
- 1.Bc5!
This is a version of 161439
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 5
- Sets
- K(d);P_SPINP(g),S_FLIGHT::QAR1(D)
- S(c);N_GUARD::QAB1(D)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(e);N_GUARD,SBLOCK,XB(E)::QAR1(D),XP(g)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- K(d);P_SPINP(g),S_FLIGHT::QAR1(D)
- S(e);N_GUARD,SBLOCK,XB(E)::QAR1(D),XP(g)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(c);N_GUARD::QAB1(D)
- Refutation
- S(c);CHECK
- Try
- K(C);S_FLIGHT
- Vars
- S(c);N_GUARD::QAB1(D),XS(c)
- S(c);N_GUARD::QAB1(D)
- Refutation
- S(e);CHECK,XB(E)
- Try
- B(E);P_SPINQ(D)
- Threat
- B(A),XR(b)
- Vars
- S(e);N_PINQ(D)::QAR1(D),XP(g)
- Refutation
- K(d);P_SPINP(g),S_FLIGHT
- Try
- B(E);P_SPINQ(D)
- Threat
- B(A),XR(b)
- Vars
- S(e);N_PINQ(D)::QAR1(D),XP(g)
- Refutation
- K(d);P_SPINP(g),S_FLIGHT
- Try
- B(E);P_SPINQ(D)
- Threat
- QAB1(D),XR(b)
- Vars
- K(d);N_SPINR(b),P-FLIGHT::QAR1(D),XR(b)
- S(c);N_PINQ(D)::QAR2(D)
- S(e);N_PINQ(D)::QAR1(D),XP(g)
- Refutation
- K(d);P_SPINP(g),S_FLIGHT
- Try
- B(E);P_SPINQ(D)
- Threat
- QAB1(D),XR(b)
- Vars
- K(d);N_SPINR(b),P-FLIGHT::QAR1(D),XR(b)
- S(c);N_PINQ(D)::QAR2(D)
- S(e);N_PINQ(D)::QAR1(D),XP(g)
- Refutation
- K(d);P_SPINP(g),S_FLIGHT
- Try
- P(G);
- Vars
- S(e);N_GUARD,SBLOCK,XB(E)::QAR1(D),XP(g)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(c);N_GUARD::QAB1(D)
- Refutation
- K(d);P_SPINP(g),S_FLIGHT
- Try
- Actual
- B(E);P_SPINQ(D)
- Threat
- QAB1(D),XR(b)
- Vars
- K(d);N_SPINR(b),P-FLIGHT::QAR1(D),XR(b)
- K(d);P_SPINP(g),S_FLIGHT::B(A),XR(b)
- S(c);N_PINQ(D)::QAR2(D)
- S(e);N_PINQ(D)::QAR1(D),XP(g)
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