MESON Chess Problem Database
Problem Display
PID: 202266 (3k4/2n1pP2/1KQ1n3/R7/8/8/8/8 w - - 0 1)
Stubbs, Arthur Goodwin
2nd Prize, Good Companions, 1923
#2
4 + 4
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kc8
- 2.Ra8#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 2.Qe8#
- 1...Sd5+
- 2.Rxd5#
- 1...Sa6
- 2.Rd5#
- 2.Qe8#
- 1...Sa8+
- 2.Rxa8#
- 1...Se8
- 2.Ra8#
- 2.Qxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Kc8
- Tries
- 1.Kb7?
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 2.Qe8#
- 2.Qc8#
- 1...Sd5
- 2.Rxd5#
- 2.Ra8#
- 2.Qxd5#
- 2.Qe8#
- 2.Qc8#
- 1...Sa6
- 2.Rd5#
- 2.Qd5#
- 2.Qe8#
- 2.Qc8#
- 1...Sa8
- 2.Rd5#
- 2.Rxa8#
- 2.Qd5#
- 2.Qe8#
- 2.Qc8#
- 1...Se8
- 2.Ra8#
- 2.Qxe8#
- 2.Qc8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sc5+!
- 1...Sd4
- 1.Ra1?
- 1...Sa8+
- 2.Rxa8#
- 1...Kc8
- 2.Ra8#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 2.Qe8#
- 1...Sa6
- 2.Qe8#
- 1...Se8
- 2.Ra8#
- 2.Qxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sd5+!
- 1...Sa8+
- 1.Ra2?
- 1...Sa8+
- 2.Rxa8#
- 1...Kc8
- 2.Ra8#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 2.Qe8#
- 1...Sa6
- 2.Qe8#
- 1...Se8
- 2.Ra8#
- 2.Qxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sd5+!
- 1...Sa8+
- 1.Ra3?
- 1...Sa8+
- 2.Rxa8#
- 1...Kc8
- 2.Ra8#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 2.Qe8#
- 1...Sa6
- 2.Qe8#
- 1...Se8
- 2.Ra8#
- 2.Qxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sd5+!
- 1...Sa8+
- 1.Ra4?
- 1...Sa8+
- 2.Rxa8#
- 1...Kc8
- 2.Ra8#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 2.Qe8#
- 1...Sa6
- 2.Qe8#
- 1...Se8
- 2.Ra8#
- 2.Qxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sd5+!
- 1...Sa8+
- 1.Rd5+?
- 1...Kc8
- 2.Qb7#
- 1...Sxd5+!
- 1...Kc8
- 1.Ra6?
- 1...Sa8+
- 2.Rxa8#
- 1...Kc8
- 2.Ra8#
- 1...Sxa6
- 2.Qe8#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 2.Qe8#
- 1...Se8
- 2.Ra8#
- 2.Qxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sd5+!
- 1...Sa8+
- 1.Ra7?
- 1...Sa8+
- 2.Rxa8#
- 2.Qxa8#
- 1...Kc8
- 2.Ra8#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Rd7#
- 2.Ra8#
- 2.Qd7#
- 2.Qa8#
- 2.Qe8#
- 1...Sa6
- 2.Rd7#
- 2.Qd7#
- 2.Qe8#
- 1...Se8
- 2.Rd7#
- 2.Ra8#
- 2.Qd7#
- 2.Qa8#
- 2.Qxe8#
- 2.fxe8Q#
- 2.fxe8R#
- 1...Sd5+!
- 1...Sa8+
- 1.Qxe6?
- 1...Sd5+
- 2.Rxd5#
- 1...Sa8+
- 2.Rxa8#
- 1...Sb5
- 2.Ra8#
- 2.f8Q#
- 2.f8R#
- 1...Sa6
- 2.Rd5#
- 2.f8Q#
- 2.f8R#
- 1...Se8
- 2.Ra8#
- 1...Sxe6!
- 1...Sd5+
- 1.f8Q+?
- 1...Se8
- 2.Rd5#
- 2.Ra8#
- 2.Qcxe8#
- 2.Qfxe8#
- 1...Sxf8!
- 1...Se8
- 1.f8R+?
- 1...Se8
- 2.Rd5#
- 2.Ra8#
- 2.Rxe8#
- 2.Qxe8#
- 1...Sxf8!
- 1...Se8
- 1.Kb7?
- Keys
- 1.Qb7!
- 1...Sd5+
- 2.Rxd5#
- 1...Sa8+
- 2.Rxa8#
- 1...Kd7
- 2.Rd5#
- 1...Sd4
- 2.Qxc7#
- 1...Sf4
- 2.Qxc7#
- 1...Sc5
- 2.Qxc7#
- 1...Sg5
- 2.Qxc7#
- 1...Sg7
- 2.Qxc7#
- 1...Sf8
- 2.Qxc7#
- 1...Sb5
- 2.Ra8#
- 1...Sa6
- 2.Rd5#
- 1...Se8
- 2.Ra8#
- 1...Sd5+
- 1.Qb7!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(a);N_GUARD::QAB1(C),XS(b)
- S(b);CHECK,N_GUARD::R(A),XS(b)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- S(a);N_GUARD::QAB1(C),XS(b)
- Refutation
- S(a);CHECK
- Try
- R(A);
- Vars
- S(b);CHECK,N_GUARD::R(A),XS(b)
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(a);N_GUARD::QAB1(C),XS(b)
- S(b);N_GUARD::QAR1(C)
- Refutation
- S(b);CHECK
- Try
- R(A);
- Vars
- S(b);CHECK,N_GUARD::R(A),XS(b)
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(a);N_GUARD::QAB1(C),XS(b)
- S(b);N_GUARD::QAR1(C)
- Refutation
- S(b);CHECK
- Try
- R(A);
- Vars
- S(b);CHECK,N_GUARD::R(A),XS(b)
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(a);N_GUARD::QAB1(C),XS(b)
- S(b);N_GUARD::QAR1(C)
- Refutation
- S(b);CHECK
- Try
- R(A);
- Vars
- S(b);CHECK,N_GUARD::R(A),XS(b)
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(a);N_GUARD::QAB1(C),XS(b)
- S(b);N_GUARD::QAR1(C)
- Refutation
- S(b);CHECK
- Try
- R(A);CHECK
- Vars
- K(d);P-FLIGHT,P_SPINS(b)::QAB1(C)
- Refutation
- S(b);CHECK,XR(A)
- Try
- R(A);
- Vars
- S(b);CHECK,N_GUARD::R(A),XS(b)
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(b);N_GUARD,XR(A)::QAR1(C)
- S(a);N_GUARD::QAB1(C),XS(b)
- Refutation
- S(b);CHECK
- Try
- R(A);
- Vars
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(a);N_GUARD::QAB1(C),XS(b)
- Refutation
- S(b);CHECK
- Try
- Q(C);XS(a)
- Vars
- S(b);CHECK,N_GUARD::R(A),XS(b)
- S(b);N_GUARD::R(A)
- Refutation
- S(b);XQ(C)
- Try
- P(D);CHECK
- Refutation
- S(a);XQ(D)
- Try
- P(D);CHECK
- Refutation
- S(a);XR(D)
- Try
- Actual
- Q(C);
- Vars
- S(b);CHECK,N_GUARD::R(A),XS(b)
- K(d);P-FLIGHT,P_SPINS(b)::R(A)
- S(a);N_GUARD::QAB1(C),XS(b)
- S(b);N_GUARD::R(A)
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