MESON Chess Problem Database
Problem Display
PID: 54834 (1RB5/p5Q1/K4B2/2ppn3/N1k5/1n6/2Pb1P2/N2R4 w - - 0 1)
Evans, TC
The Observer, 1929
(First published on Sun Jun 2 1929)
#2
10 + 7
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Qg4#
- 1...Bc1
- 2.cxb3#
- 1...Be1
- 2.cxb3#
- 1...Bc3
- 2.cxb3#
- 1...Be3
- 2.cxb3#
- 1...Bb4
- 2.cxb3#
- 1...Bf4
- 2.cxb3#
- 1...Ba5
- 2.cxb3#
- 1...Bg5
- 2.cxb3#
- 1...Bh6
- 2.cxb3#
- 1...Sd3
- 2.cxb3#
- 1...Sf3
- 2.Sb2#
- 1...Sg4
- 2.Sb2#
- 1...Sc6
- 2.Sb2#
- 1...Sg6
- 2.Sb2#
- 1...Sd7
- 2.Sb2#
- 1...Sf7
- 2.Sb2#
- 1...d4
- 2.Be6#
- 1...Kd4
- Tries
- 1.Bxe5?
- threat
- 2.Sb2#
- 1...d4
- 2.Be6#
- 2.Qf7#
- 2.Qg8#
- 1...Bc1
- 2.cxb3#
- 1...Bc3
- 2.cxb3#
- 1...Sd4!
- threat
- 1.Qf8?
- 1...Sxa1
- 2.Qxc5#
- 1...Sc1
- 2.Qxc5#
- 1...Bc1
- 2.cxb3#
- 1...Be1
- 2.cxb3#
- 1...Bc3
- 2.cxb3#
- 1...Be3
- 2.cxb3#
- 1...Bb4
- 2.cxb3#
- 1...Bf4
- 2.cxb3#
- 1...Ba5
- 2.cxb3#
- 1...Bg5
- 2.cxb3#
- 1...Bh6
- 2.cxb3#
- 1...Sd4
- 2.Qxc5#
- 1...Sa5
- 2.Qxc5#
- 1...Sd3
- 2.cxb3#
- 1...Sf3
- 2.Sb2#
- 1...Sg4
- 2.Sb2#
- 1...Sc6
- 2.Sb2#
- 1...Sg6
- 2.Sb2#
- 1...Sd7
- 2.Sb2#
- 1...Sf7
- 2.Sb2#
- 1...d4
- 2.Be6#
- 1...Kd4!
- 1...Sxa1
- 1.Qg4+?
- 1...Bf4
- 2.cxb3#
- 1...Sxg4
- 2.Sb2#
- 1...d4
- 2.Be6#
- 2.Qe6#
- 1...Sd4!
- 1...Bf4
- 1.Qc7?
- 1...Sxa1
- 2.Qxc5#
- 1...Sc1
- 2.Qxc5#
- 1...Bc1
- 2.cxb3#
- 1...Be1
- 2.cxb3#
- 1...Bc3
- 2.cxb3#
- 1...Be3
- 2.cxb3#
- 1...Bb4
- 2.cxb3#
- 1...Bf4
- 2.cxb3#
- 1...Ba5
- 2.cxb3#
- 1...Bg5
- 2.cxb3#
- 1...Bh6
- 2.cxb3#
- 1...Sd4
- 2.Qxc5#
- 1...Sa5
- 2.Qxc5#
- 1...Sd3
- 2.cxb3#
- 1...Sf3
- 2.Sb2#
- 1...Sg4
- 2.Sb2#
- 1...Sc6
- 2.Sb2#
- 1...Sg6
- 2.Sb2#
- 1...Sd7
- 2.Sb2#
- 1...Sf7
- 2.Sb2#
- 1...d4
- 2.Be6#
- 1...Kd4!
- 1...Sxa1
- 1.Qe7?
- 1...Sxa1
- 2.Qxc5#
- 1...Sc1
- 2.Qxc5#
- 1...Bc1
- 2.cxb3#
- 1...Be1
- 2.cxb3#
- 1...Bc3
- 2.cxb3#
- 1...Be3
- 2.cxb3#
- 1...Bb4
- 2.cxb3#
- 1...Bf4
- 2.cxb3#
- 1...Ba5
- 2.cxb3#
- 1...Bg5
- 2.cxb3#
- 1...Bh6
- 2.cxb3#
- 1...Sd4
- 2.Qxc5#
- 1...Sa5
- 2.Qxc5#
- 1...Sd3
- 2.cxb3#
- 1...Sf3
- 2.Sb2#
- 2.Qe2#
- 1...Sg4
- 2.Sb2#
- 2.Qe2#
- 1...Sc6
- 2.Sb2#
- 2.Qe2#
- 1...Sg6
- 2.Sb2#
- 2.Qe2#
- 1...Sd7
- 2.Sb2#
- 2.Qe2#
- 1...Sf7
- 2.Sb2#
- 2.Qe2#
- 1...d4
- 2.Be6#
- 2.Qe6#
- 1...Kd4!
- 1...Sxa1
- 1.Bxe5?
- Keys
- 1.Qxa7!
- 1...Kd4
- 2.Rb4#
- 1...Sxa1
- 2.Qxc5#
- 1...Sc1
- 2.Qxc5#
- 1...Bc1
- 2.cxb3#
- 1...Be1
- 2.cxb3#
- 1...Bc3
- 2.cxb3#
- 1...Be3
- 2.cxb3#
- 1...Bb4
- 2.cxb3#
- 1...Bf4
- 2.cxb3#
- 1...Ba5
- 2.cxb3#
- 1...Bg5
- 2.cxb3#
- 1...Bh6
- 2.cxb3#
- 1...Sd4
- 2.Qxc5#
- 1...Sa5
- 2.Qxc5#
- 1...Sd3
- 2.cxb3#
- 1...Sf3
- 2.Sb2#
- 1...Sg4
- 2.Sb2#
- 1...Sc6
- 2.Sb2#
- 1...Sg6
- 2.Sb2#
- 1...Sd7
- 2.Sb2#
- 1...Sf7
- 2.Sb2#
- 1...d4
- 2.Be6#
- 1...Kd4
- 1.Qxa7!
This is a version
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- K(c);P-FLIGHT,P_SPINB(a),P_SPINS(f)::QAR(H)
- B(a);::P(C),XS(b)
- S(f);SBLOCK::P(C),XS(b)
- S(f);::S(E)
- P(e);OGATEB,SBLOCK::B(J)
- Tries
- Try
- B(G);XS(f)
- Threat
- S(E)
- Vars
- B(a);::P(C),XS(b)
- Refutation
- S(b);
- Try
- Q(H);
- Vars
- S(b);N_GUARD,XS(A)::QAR1(H),XP(d)
- S(b);N_GUARD::QAR1(H),XP(d)
- B(a);::P(C),XS(b)
- S(f);SBLOCK::P(C),XS(b)
- S(f);::S(E)
- P(e);OGATEB,SBLOCK::B(J)
- Refutation
- K(c);P-FLIGHT,P_SPINB(a),P_SPINS(f)
- Try
- Q(H);CHECK
- Vars
- B(a);P_SPINB(a)::P(C),XS(b)
- S(f);XQ(H)::S(E)
- Refutation
- S(b);P_SPINS(b)
- Try
- Q(H);P_PINP(d)
- Vars
- S(b);N_GUARD,XS(A)::QAR1(H),XP(d)
- S(b);N_GUARD::QAR1(H),XP(d)
- B(a);::P(C),XS(b)
- S(f);SBLOCK::P(C),XS(b)
- S(f);::S(E)
- S(f);N_SPINP(d)::S(E)
- P(e);OGATEB,SBLOCK::B(J)
- Refutation
- K(c);N_SPINP(d),P-FLIGHT,P_SPINB(a),P_SPINS(f)
- Try
- Q(H);
- Vars
- S(b);N_GUARD,XS(A)::QAR1(H),XP(d)
- S(b);N_GUARD::QAR1(H),XP(d)
- B(a);::P(C),XS(b)
- S(f);SBLOCK::P(C),XS(b)
- Refutation
- K(c);P-FLIGHT,P_SPINB(a),P_SPINS(f)
- Try
- Actual
- Q(H);XP(g)
- Vars
- K(c);P-FLIGHT,P_SPINB(a),P_SPINP(d),P_SPINS(f)::R(I)
- S(b);N_GUARD,XS(A)::QAR1(H),XP(d)
- S(b);N_GUARD::QAR1(H),XP(d)
- B(a);::P(C),XS(b)
- S(f);SBLOCK::P(C),XS(b)
- S(f);::S(E)
- P(e);OGATEB,SBLOCK::B(J)
Developed and maintained by Brian Stephenson.
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CSS/Javascript (jQuery, Bootstrap & DataTables).