MESON Chess Problem Database

Problem Display
PID: 17026 (K1kB4/1n3p2/8/3Q4/8/8/7b/8 w - - 0 1)

Seinin, A

Shakhmaty v SSSR, 1945

K1kB4/1n3p2/8/3Q4/8/8/7b/8

#2

3 + 4

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
145 StrateGems 2006

SOLUTION

  • SOUND
  • Tries
    • 1.Bb6?
      • threat
        • 2.Qxb7#
        • 2.Qf5#
      • 1...Sd6
        • 2.Qc6#
      • 1...Be5
        • 2.Qxb7#
      • 1...Sa5
        • 2.Qf5#
        • 2.Qd8#
      • 1...Sc5
        • 2.Qd8#
      • 1...Sd8
        • 2.Qxd8#
      • 1...f5
        • 2.Qe6#
        • 2.Qxb7#
        • 2.Qxf5#
      • 1...Bc7!
    • 1.Bf6?
      • threat
        • 2.Qxb7#
      • 1...Sd6
        • 2.Qc6#
      • 1...Bc7
        • 2.Qf5#
      • 1...Sa5
        • 2.Qd8#
      • 1...Sc5
        • 2.Qd8#
      • 1...Sd8
        • 2.Qxd8#
      • 1...Kc7!
    • 1.Qc6+?
      • 1...Bc7
        • 2.Qxc7#
      • 1...Kxd8!
  • Keys
    • 1.Be7!
      • threat
        • 2.Qxb7#
      • 1...Kc7
        • 2.Qxb7#
      • 1...Sd6
        • 2.Qc6#
      • 1...Bc7
        • 2.Qf5#
      • 1...Sa5
        • 2.Qd8#
      • 1...Sc5
        • 2.Qd8#
      • 1...Sd8
        • 2.Qxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);S_CUTB(a)::QAR2(A)
        • B(a);::QAB1(A),XS(b)
        • S(b);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • B(a);
    • Try
      • B(C);
      • Threat
        • QAB1(A),XS(b)
      • Vars
        • S(b);S_CUTB(a)::QAR2(A)
        • B(a);SBLOCK::QAB(A)
        • S(b);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • K(d);P-FLIGHT,XB(C)
  • Actual
    • B(C);
    • Threat
      • QAB1(A),XS(b)
    • Vars
      • K(d);P-FLIGHT::QAR1(A),XS(b)
      • S(b);S_CUTB(a)::QAR2(A)
      • B(a);SBLOCK::QAB(A)
      • S(b);N_GUARD::QAR1(A)
      • S(b);N_GUARD::QAR1(A),XS(b)
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