MESON Chess Problem Database
Problem Display
PID: 203011 (8/8/1Q4p1/p1pkb1Rp/Pp3RnP/3N2N1/2P1p1r1/4Kb1B w - - 0 1)
Woodward, LA
The Observer, 1951
(First published on Sun May 27 1951)
#2
10 + 11
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Sf2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Se3
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...b3
- 2.c4#
- 1...c4
- 2.Rd4#
- 1...Sf2
- Tries
- 1.Sxb4+?
- 1...cxb4
- 2.Rd4#
- 1...axb4!
- 1...cxb4
- 1.Sxe5?
- threat
- 2.Sxg4#
- 2.Qc6#
- 1...Sh2
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sxg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qc6#
- 1...Sf2
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sxg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qc6#
- 1...Se3
- 2.Qc6#
- 1...Sf6
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sxg6#
- 2.Sd7#
- 2.Sf7#
- 2.Qc6#
- 1...Sh6
- 2.Qc6#
- 1...Sxe5!
- threat
- 1.Sxe2?
- 1...Sh2
- 2.Rxe5#
- 1...Sf2
- 2.Rxe5#
- 1...Se3
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...b3
- 2.Sc3#
- 2.c4#
- 1...c4
- 2.Rd4#
- 1...Bxe2!
- 1...Sh2
- 1.Sxh5?
- 1...Sh2
- 2.Sf6#
- 2.Rxe5#
- 1...Sf2
- 2.Sf6#
- 2.Rxe5#
- 1...Se3
- 2.Sf6#
- 2.Rxe5#
- 1...Sf6
- 2.Sxf6#
- 2.Rxe5#
- 1...Sh6
- 2.Sf6#
- 2.Rxe5#
- 1...b3
- 2.c4#
- 1...c4
- 2.Rd4#
- 1...gxh5!
- 1...Sh2
- 1.Rd4+?
- 1...Kxd4
- 2.Qxc5#
- 1...cxd4!
- 1...Kxd4
- 1.Rf6?
- threat
- 2.Qxc5#
- 1...Kc4
- 2.Qxc5#
- 1...Kd4
- 2.Qxc5#
- 1...c4
- 2.Sf4#
- 2.Rd6#
- 2.Qc5#
- 2.Qd8#
- 2.Qd6#
- 1...Sxf6!
- threat
- 1.Qc7?
- threat
- 2.Qd7#
- 1...Sf6
- 2.Rxe5#
- 1...Ke6!
- threat
- 1.Qd8+?
- 1...Ke6
- 2.Sxc5#
- 1...Kc6!
- 1...Ke6
- 1.Qa6?
- 1...Sh2
- 2.Rxe5#
- 1...Sf2
- 2.Rxe5#
- 1...Se3
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...b3
- 2.c4#
- 1...c4!
- 1...Sh2
- 1.c3?
- threat
- 2.c4#
- 1...Se3
- 2.Rxe5#
- 1...c4
- 2.Rd4#
- 1...bxc3!
- threat
- 1.Sxb4+?
- Keys
- 1.Se4!
- 1...Kc4
- 2.Qxc5#
- 1...Kd4
- 2.Qxc5#
- 1...Sh2
- 2.Sf6#
- 1...Rg1
- 2.Sc3#
- 2.Sf6#
- 1...Rf2
- 2.Sc3#
- 2.Sf6#
- 1...Rh2
- 2.Sc3#
- 2.Sf6#
- 1...Rg3
- 2.Sc3#
- 2.Sf6#
- 1...Sf2
- 2.Sf6#
- 1...Se3
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...b3
- 2.Sc3#
- 1...c4
- 2.Qd6#
- 1...Kc4
- 1.Se4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(e);N_GUARD::R1(I),XB(i)
- P(d);N_GUARD::P(C)
- P(g);N_GUARD::R1(G)
- Tries
- Try
- S(D);CHECK,XP(d)
- Vars
- P(g);XS(D)::R1(G)
- Refutation
- P(f);XS(D)
- Try
- S(D);XB(i)
- Threat
- DUALS(2)
- Vars
- S(e);::QAB1(J)
- Refutation
- S(e);P_SPINS(e),XS(D)
- Try
- S(E);XP(b)
- Vars
- S(e);N_GUARD::R1(I),XB(i)
- P(g);N_GUARD::R1(G)
- Refutation
- B(a);XS(E)
- Try
- S(E);XP(j)
- Vars
- P(d);N_GUARD::P(C)
- P(g);N_GUARD::R1(G)
- Refutation
- P(k);XS(E)
- Try
- R(G);CHECK
- Vars
- K(h);N_SPINB(i),N_SPINR(c),P-FLIGHT,P_SPINP(g),XR(G)::QAB1(J),XP(g)
- Refutation
- P(g);XR(G)
- Try
- R(G);
- Threat
- QAR1(J),XP(g)
- Vars
- K(h);N_SPINB(i),N_SPINR(c),S_FLIGHT::QAR1(J),XP(g)
- K(h);N_SPINB(i),N_SPINR(c),P-FLIGHT,P_SPINP(g)::QAB1(J),XP(g)
- Refutation
- S(e);XR(G)
- Try
- Q(J);
- Threat
- QAR2(J)
- Vars
- S(e);N_GUARD::R1(I),XB(i)
- Refutation
- K(h);N_SPINB(i),N_SPINR(c),S_FLIGHT
- Try
- Q(J);CHECK
- Vars
- K(h);N_SPINB(i),N_SPINR(c),S_FLIGHT::S(D),XP(g)
- Refutation
- K(h);N_SPINB(i),S_FLIGHT
- Try
- Q(J);
- Vars
- S(e);N_GUARD::R1(I),XB(i)
- P(d);N_GUARD::P(C)
- Refutation
- P(g);
- Try
- P(C);
- Threat
- P(C)
- Vars
- S(e);N_GUARD::R1(I),XB(i)
- P(g);N_GUARD::R1(G)
- Refutation
- P(d);XP(C)
- Try
- Actual
- S(E);N_PINR(c)
- Vars
- K(h);N_SPINB(i),S_FLIGHT::QAR1(J),XP(g)
- K(h);N_SPINB(i),P-FLIGHT,P_SPINP(g)::QAB1(J),XP(g)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- P(d);N_GUARD::S(E)
- P(g);SBLOCK::QAR1(J)
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