MESON Chess Problem Database
Problem Display
PID: 161439 (8/3p4/3Pp2p/pP2p2R/P3k1n1/pKQ1Br2/Pn5p/2N4B w - - 0 1)
Penrose, Lionel Sharples
The Observer, 1923
(First published on Sun Apr 8 1923)
#2
10 + 11
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Qd4#
- 1...Sd1
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sxa4
- 2.Qd3#
- 1...Sc4
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sxe3
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Kd5
- Tries
- 1.Kc2?
- 1...Kd5
- 2.Qd4#
- 1...Sxa4
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sd1
- 2.Qd3#
- 1...Sc4
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sxe3+!
- 1...Kd5
- 1.Kxa3?
- 1...Kd5
- 2.Qd4#
- 1...Sxa4
- 2.Qd3#
- 1...Sxe3
- 2.Qxe5#
- 1...Sd3
- 2.Qxd3#
- 1...Sd1
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Sc4+!
- 1...Kd5
- 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...Sxa4
- 2.Qd3#
- 1...Sxe3
- 2.Qxe5#
- 1...Sd3
- 2.Qxd3#
- 1...Sd1
- 2.Qd3#
- 1...Sc4
- 2.Qd3#
- 1...Sf2
- 2.Rxe5#
- 2.Qxe5#
- 1...Sf6
- 2.Rxe5#
- 2.Qxe5#
- 1...Kd5!
- 1...Sxa4
- 1.Kc2?
- 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!
There are these versions: 322
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- K(e);P_SPINP(h),S_FLIGHT::QAR1(E)
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- S(a);N_GUARD,XP(G)::QAB1(E)
- S(f);N_GUARD,SBLOCK,XB(F)::QAR1(E),XP(h)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- K(e);P_SPINP(h),S_FLIGHT::QAR1(E)
- S(a);N_GUARD,XP(G)::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- S(a);N_GUARD::QAB1(E)
- Refutation
- S(f);CHECK,XB(F)
- Try
- K(D);P-FLIGHT,XP(c)
- Vars
- K(e);P_SPINP(h),S_FLIGHT::QAR1(E)
- S(a);N_GUARD,XP(G)::QAB1(E)
- S(f);N_GUARD,SBLOCK,XB(F)::QAR1(E),XP(h)
- S(a);N_GUARD::QAB1(E),XS(a)
- S(a);N_GUARD::QAB1(E)
- Refutation
- S(a);CHECK
- Try
- B(F);P_SPINQ(E)
- Threat
- B(B),XR(d)
- Vars
- S(f);N_PINQ(E)::QAR1(E),XP(h)
- Refutation
- K(e);P_SPINP(h),S_FLIGHT
- Try
- B(F);P_SPINQ(E)
- Threat
- QAB1(E),XR(d)
- Vars
- K(e);N_SPINR(d),P-FLIGHT::QAR1(E),XR(d)
- S(a);N_PINQ(E)::QAR2(E)
- S(f);N_PINQ(E)::QAR1(E),XP(h)
- Refutation
- K(e);P_SPINP(h),S_FLIGHT
- Try
- B(F);P_SPINQ(E)
- Threat
- QAB1(E),XR(d)
- Vars
- K(e);N_SPINR(d),P-FLIGHT::QAR1(E),XR(d)
- S(a);N_PINQ(E)::QAR2(E)
- S(f);N_PINQ(E)::QAR1(E),XP(h)
- Refutation
- K(e);P_SPINP(h),S_FLIGHT
- Try
- P(H);
- Vars
- S(a);N_GUARD,XP(G)::QAB1(E)
- S(f);N_GUARD,SBLOCK,XB(F)::QAR1(E),XP(h)
- S(a);N_GUARD::QAB1(E),XS(a)
- S(a);N_GUARD::QAB1(E)
- Refutation
- K(e);P_SPINP(h),S_FLIGHT
- Try
- Actual
- B(F);P_SPINQ(E)
- Threat
- QAB1(E),XR(d)
- Vars
- K(e);N_SPINR(d),P-FLIGHT::QAR1(E),XR(d)
- K(e);P_SPINP(h),S_FLIGHT::B(B),XR(d)
- S(a);N_PINQ(E)::QAR2(E)
- S(f);N_PINQ(E)::QAR1(E),XP(h)
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