MESON Chess Problem Database
Problem Display
PID: 200938 (7b/1p1K2n1/1P4Q1/r2k4/1Rq1N3/p1B5/Bn6/8 w - - 0 1)
Dale, John
The Observer, 1949
(First published on Sun Mar 13 1949)
#2
7 + 8
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxa2
- 2.Qd6#
- 1...Qb3
- 2.Qd6#
- 1...Ra4
- 2.Rb5#
- 1...Rb5
- 2.Rxb5#
- 1...Rc5
- 2.Sf6#
- 1...Ra6
- 2.Rb5#
- 1...Ra7
- 2.Rb5#
- 1...Ra8
- 2.Rb5#
- 1...Sd1
- 2.Bxc4#
- 1...Sd3
- 2.Bxc4#
- 1...Sa4
- 2.Bxc4#
- 1...Sf5
- 2.Qe6#
- 1...Sh5
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Se8
- 2.Qe6#
- 1...Qxa2
- Tries
- 1.Bb3?
- 1...Qxb3
- 2.Qd6#
- 1...Sf5
- 2.Qe6#
- 1...Ra4
- 2.Rb5#
- 1...Rb5
- 2.Rxb5#
- 1...Rc5
- 2.Sf6#
- 1...Ra6
- 2.Rb5#
- 1...Ra7
- 2.Rb5#
- 1...Ra8
- 2.Rb5#
- 1...Sd1
- 2.Bxc4#
- 1...Sd3
- 2.Bxc4#
- 1...Sa4
- 2.Bxc4#
- 1...Sh5
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Se8
- 2.Qe6#
- 1...a2!
- 1...Qxb3
- 1.Bxb2?
- threat
- 2.Bxc4#
- 1...Qxa2
- 2.Qd6#
- 1...Sf5
- 2.Qe6#
- 1...Qb3
- 2.Bxb3#
- 2.Qd6#
- 1...Rc5
- 2.Sf6#
- 1...axb2!
- threat
- 1.Bxg7?
- threat
- 2.Qf5#
- 2.Qe6#
- 1...Sd3
- 2.Bxc4#
- 2.Qe6#
- 1...Bxg7!
- threat
- 1.Rxc4?
- threat
- 2.Sf6#
- 2.Rc5#
- 2.Qd6#
- 1...Sf5
- 2.Qf7#
- 2.Qe6#
- 2.Qg8#
- 1...Rc5
- 2.Sf6#
- 2.Rxc5#
- 2.Qd6#
- 1...Sh5
- 2.Rc5#
- 2.Qf7#
- 2.Qd6#
- 2.Qe6#
- 2.Qg8#
- 1...Se6
- 2.Rc5#
- 2.Qxe6#
- 1...Se8
- 2.Rc5#
- 2.Qf7#
- 2.Qe6#
- 2.Qg8#
- 1...Sxc4!
- threat
- 1.Qf7+?
- 1...Se6
- 2.Qxe6#
- 1...Kxe4!
- 1...Se6
- 1.Qe8?
- threat
- 2.Qe5#
- 1...Se6
- 2.Qxe6#
- 1...Sf5
- 2.Qe6#
- 1...Sd3
- 2.Bxc4#
- 1...Sh5
- 2.Qe6#
- 1...Sxe8!
- threat
- 1.Qf6?
- threat
- 2.Qd4#
- 2.Qe5#
- 1...Sf5
- 2.Qe6#
- 1...Sd3
- 2.Qd4#
- 1...Sh5
- 2.Qe6#
- 1...Se6
- 2.Qxe6#
- 1...Se8
- 2.Qe6#
- 1...Kxe4!
- threat
- 1.Bb3?
- Keys
- 1.Bf6!
- 1...Qxa2
- 2.Rd4#
- 1...Sf5
- 2.Qxf5#
- 1...Qb3
- 2.Rd4#
- 1...Ra4
- 2.Rb5#
- 1...Rb5
- 2.Rxb5#
- 1...Rc5
- 2.Sc3#
- 1...Ra6
- 2.Rb5#
- 1...Ra7
- 2.Rb5#
- 1...Ra8
- 2.Rb5#
- 1...Sd1
- 2.Bxc4#
- 1...Sd3
- 2.Bxc4#
- 1...Sa4
- 2.Bxc4#
- 1...Sh5
- 2.Qf5#
- 1...Se6
- 2.Qf5#
- 1...Se8
- 2.Qf5#
- 1...Qxa2
- 1.Bf6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(c);N_SPINQ(c),XB(A)::QAR1(F)
- Q(c);::QAR1(F)
- R(d);N_GUARD::R(C)
- R(d);N_GUARD::R(C),XR(d)
- R(d);SBLOCK::S(D)
- S(a);N_GUARD::B(A),XQ(c)
- S(g);N_GUARD::QAB1(F)
- S(g);N_GUARD::QAB1(F),XS(g)
- Tries
- Try
- B(A);
- Vars
- Q(c);N_SPINQ(c),XB(A)::QAR1(F)
- S(g);N_GUARD::QAB1(F)
- R(d);N_GUARD::R(C)
- R(d);N_GUARD::R(C),XR(d)
- R(d);SBLOCK::S(D)
- S(a);N_GUARD::B(A),XQ(c)
- S(g);N_GUARD::QAB1(F),XS(g)
- Refutation
- P(b);
- Try
- B(B);XS(a)
- Threat
- B(A),XQ(c)
- Vars
- Q(c);N_SPINQ(c),XB(A)::QAR1(F)
- S(g);N_GUARD::QAB1(F)
- R(d);SBLOCK::S(D)
- Refutation
- P(b);XB(B)
- Try
- B(B);XS(g)
- Threat
- DUALS(2)
- Refutation
- B(h);XB(B)
- Try
- R(C);XQ(c)
- Threat
- DUALS(3)
- Refutation
- S(a);P_SPINS(a),XR(C)
- Try
- Q(F);CHECK
- Vars
- S(g);N_GUARD,P_SPINS(g)::QAB1(F),XS(g)
- Refutation
- K(e);S_FLIGHT,XS(D)
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- S(g);N_GUARD::QAB1(F),XS(g)
- S(g);N_GUARD::QAB1(F)
- S(a);N_GUARD::B(A),XQ(c)
- Refutation
- S(g);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- S(g);N_GUARD::QAB1(F)
- S(a);::QAR1(F)
- S(g);N_GUARD::QAB1(F),XS(g)
- Refutation
- K(e);S_FLIGHT,XS(D)
- Try
- Actual
- B(B);
- Vars
- Q(c);N_SPINQ(c),OGATE,XB(A)::R1(C)
- S(g);N_GUARD::QAR2(F),XS(g)
- Q(c);OGATE::R1(C)
- R(d);N_GUARD::R(C)
- R(d);N_GUARD::R(C),XR(d)
- R(d);SBLOCK::S(D)
- S(a);N_GUARD::B(A),XQ(c)
- S(g);N_GUARD::QAR2(F)
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