MESON Chess Problem Database

Problem Display
PID: 138659 (8/2K1pr2/QN2N1bR/1p2k2q/4P1r1/7B/5R2/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

2nd Prize, Alma-Ata, 1961

8/2K1pr2/QN2N1bR/1p2k2q/4P1r1/7B/5R2/8

#2

8 + 7

6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Sc4#
      • 2.Sd7#
    • 1...Rxe4
      • 2.Qxb5#
    • 1...Bxe4
      • 2.Qa1#
  • Tries
    • 1.Qxb5+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kxe6!
    • 1.Qa1+?
      • 1...Kxe4
        • 2.Qd4#
      • 1...Kxe6!
  • Keys
    • 1.Re2!
      • threat
        • 2.Sd7#
      • 1...Kxe6
        • 2.Sc4#
        • 2.Sd7#
      • 1...Kf6
        • 2.Sd7#
      • 1...Rxe4
        • 2.Qa1#
      • 1...Bxe4
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK,XP(C)::QAR(D),XP(b)
    • B(e);SBLOCK,XP(C)::QAB(D)
  • Tries
    • Try
      • Q(D);CHECK,XP(b)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(C)::QAR2(D)
      • Refutation
        • K(c);P-FLIGHT,P_SPINB(e),P_SPINR(a),XS(F)
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(C)::QAR1(D)
      • Refutation
        • K(c);P-FLIGHT,P_SPINB(e),P_SPINR(a),XS(F)
  • Actual
    • R(A);
    • Threat
      • S(E)
    • Vars
      • K(c);P_SPINB(e),S_FLIGHT::S(E)
      • R(a);P_SPINR(a),XP(C)::QAB(D)
      • B(e);P_SPINB(e),XP(C)::QAR(D),XP(b)
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