MESON Chess Problem Database
Problem Display
PID: 74706 (4R3/qPkNnN1K/8/8/1Q6/8/8/8 w - - 0 1)
Pettersson, Bertil
Schach-Echo, 1968
#2
6 + 3
| 3310 | 2345 Chess Problems | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Qxb7
- 2.Qd6#
- 1...Sc8
- 2.bxc8Q#
- 1...Qxb7
- Tries
- 1.Sfe5?
- 1...Qc5
- 2.b8Q#
- 2.b8B#
- 1...Qb6
- 2.Qxb6#
- 1...Qg1
- 2.b8Q#
- 2.b8B#
- 1...Qf2
- 2.b8Q#
- 2.b8B#
- 1...Qe3
- 2.b8Q#
- 2.b8B#
- 1...Qd4
- 2.b8Q#
- 2.b8B#
- 1...Qb8
- 2.Qb6#
- 1...Qa1
- 2.Qb6#
- 2.b8Q#
- 2.b8B#
- 1...Qa2
- 2.Qb6#
- 2.b8Q#
- 2.b8B#
- 1...Qa3
- 2.Qb6#
- 2.b8Q#
- 2.b8B#
- 1...Qa4
- 2.Qb6#
- 2.b8Q#
- 2.b8B#
- 1...Qa5
- 2.b8Q#
- 2.b8B#
- 1...Qa6
- 2.b8Q#
- 2.b8B#
- 1...Qa8
- 2.Qb6#
- 2.bxa8S#
- 1...Sd5
- 2.Rc8#
- 1...Sf5
- 2.Rc8#
- 1...Sc6
- 2.Rc8#
- 1...Sg6
- 2.Rc8#
- 1...Sc8
- 2.Rxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Sg8
- 2.Rc8#
- 1...Qxb7!
- 1...Qc5
- 1.Rc8+?
- 1...Kxd7
- 2.Qd6#
- 1...Sxc8!
- 1...Kxd7
- 1.Qb6+?
- 1...Kxd7
- 2.Rd8#
- 1...Qxb6!
- 1...Kxd7
- 1.b8Q+?
- 1...Kc6
- 2.Q4d6#
- 2.Q8d6#
- 2.Q4b5#
- 1...Kxd7
- 2.Q4d6#
- 1...Qxb8!
- 1...Kc6
- 1.Sfe5?
- Keys
- 1.Sde5!
- 1...Qxb7
- 2.Qd6#
- 1...Qb6
- 2.Qxe7#
- 1...Sc8
- 2.Rxc8#
- 2.bxc8Q#
- 2.bxc8R#
- 1...Qg1
- 2.b8Q#
- 2.b8B#
- 1...Qf2
- 2.b8Q#
- 2.b8B#
- 1...Qe3
- 2.b8Q#
- 2.b8B#
- 1...Qd4
- 2.b8Q#
- 2.b8B#
- 1...Qc5
- 2.b8Q#
- 2.b8B#
- 1...Qb8
- 2.Rxe7#
- 1...Qa1
- 2.b8Q#
- 2.b8B#
- 1...Qa2
- 2.b8Q#
- 2.b8B#
- 1...Qa3
- 2.b8Q#
- 2.b8B#
- 1...Qa4
- 2.b8Q#
- 2.b8B#
- 1...Qa5
- 2.b8Q#
- 2.b8B#
- 1...Qa6
- 2.b8Q#
- 2.b8B#
- 1...Qa8
- 2.bxa8S#
- 1...Sd5
- 2.Rc8#
- 1...Sf5
- 2.Rc8#
- 1...Sc6
- 2.Rc8#
- 1...Sg6
- 2.Rc8#
- 1...Sg8
- 2.Rc8#
- 1...Qxb7
- 1.Sde5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 1
- Sets
- Q(a);SBLOCK,XP(B)::QAB1(A)
- S(c);OGATE::PXS(c)=Q
- Tries
- Try
- S(D);
- Vars
- Q(a);N_GUARD::P=Q
- Q(a);N_GUARD::QAB1(A),XQ(a)
- Q(a);N_GUARD::QAB1(A)
- S(c);N_GUARD::R1(F)
- Refutation
- Q(a);XP(B)
- Try
- R(F);CHECK
- Vars
- K(b);P-FLIGHT,XS(C)::QAR1(A)
- Refutation
- S(c);XR(F)
- Try
- Q(A);CHECK
- Vars
- K(b);P-FLIGHT,XS(C)::R1(F)
- Refutation
- Q(a);XQ(A)
- Try
- P(B);CHECK
- Vars
- K(b);P-FLIGHT,XS(C)::QAR1(A)
- Refutation
- Q(a);XQ(B)
- Try
- Actual
- S(C);
- Vars
- Q(a);SBLOCK,XP(B)::QAB1(A)
- Q(a);SBLOCK::QAR2(A),XS(c)
- Q(a);N_GUARD::P=Q
- Q(a);SBLOCK::R(F),XS(c)
- Q(a);OGATE::PXQ(a)=S
- S(c);N_GUARD::R1(F)
Developed and maintained by Brian Stephenson.
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CSS/Javascript (jQuery, Bootstrap & DataTables).