MESON Chess Problem Database

Problem Display
PID: 235442 (5Qn1/K6p/BN2p3/p4p2/rR1Bk1nR/4prpP/5p2/b7 w - - 0 1)

Pituk, Alexander

Freie Presse, 1995

5Qn1/K6p/BN2p3/p4p2/rR1Bk1nR/4prpP/5p2/b7

#2

8 + 13

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Rxg4#
    • 1...Rf4
      • 2.Qa8#
  • Tries
    • 1.Bd3+?
      • 1...Kf4
        • 2.Rxg4#
      • 1...Kxd3!
    • 1.Bb7+?
      • 1...Kf4
        • 2.Rxg4#
      • 1...Kd3!
    • 1.Qd6?
      • threat
        • 2.Qe5#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Rf4
        • 2.Qc6#
      • 1...e5
        • 2.Qxe5#
      • 1...f4!
    • 1.Qg7?
      • threat
        • 2.Qe5#
      • 1...Kf4
        • 2.Be5#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Rf4
        • 2.Qb7#
      • 1...f4
        • 2.Qxh7#
      • 1...e5
        • 2.Qxe5#
      • 1...Sf6!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qe5#
      • 1...Kf4
        • 2.Bxe3#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Rf4
        • 2.Qc6#
      • 1...f4
        • 2.Qc2#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);P-FLIGHT,P_SPINP(j)::R1(D),XS(h)
    • R(d);N_SPINS(h),SBLOCK::QAB(H)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINP(j)::R1(D),XS(h)
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT,XB(E)
    • Try
      • B(E);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINP(j)::R1(D),XS(h)
      • Refutation
        • K(g);N_SPINS(h),S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • B(a);OGATE,P_PINS(F),P_SPINB(a),XB(C)::QAR1(H),XB(a)
        • R(d);N_SPINS(h),SBLOCK::QAB(H)
        • P(k);::QAR1(H),XP(k)
      • Refutation
        • P(j);N_SPINS(h)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • K(g);P-FLIGHT::R(B)+B(C),DCHECK
        • B(a);OGATE,P_PINS(F),P_SPINB(a),XB(C)::QAR1(H),XB(a)
        • R(d);N_SPINS(h),SBLOCK::QAB(H)
        • P(j);N_SPINS(h),OGATEB,SBLOCK::QAB(H),XP(l)
        • P(k);::QAR1(H),XP(k)
      • Refutation
        • S(m);
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(g);P-FLIGHT::R(B)+B(C),DCHECK,XP(c)
      • B(a);OGATE,P_SPINB(a),XB(C)::QAR1(H),XB(a)
      • R(d);N_SPINS(h),SBLOCK::QAB(H)
      • P(j);N_SPINS(h),SBLOCK::QAB(H)
      • P(k);::QAR1(H),XP(k)
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