MESON Chess Problem Database

Problem Display
PID: 264380 (2K5/1pQ4N/3P4/5P2/5k2/3bR1pP/8/2B5 w - - 0 1)

Pituk, Alexander

3rd Prize, Prace, 1957

(First published on Wed Nov 27 1957)

2K5/1pQ4N/3P4/5P2/5k2/3bR1pP/8/2B5

#2

8 + 4

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qf7#
    • 1...Bxf5+
      • 2.d7#
  • Tries
    • 1.Re1+?
      • 1...Kxf5
        • 2.Qf7#
      • 1...Kf3!
    • 1.Re2+?
      • 1...Kxf5
        • 2.Qf7#
      • 1...Kf3!
    • 1.Re6+?
      • 1...Kxf5
        • 2.Qf7#
      • 1...Kf3!
    • 1.Re8+?
      • 1...Kxf5
        • 2.Qf7#
      • 1...Kf3!
    • 1.Qc4+?
      • 1...Kxf5
        • 2.Qf7#
        • 2.Qg4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bxc4!
    • 1.Qc5?
      • threat
        • 2.Qe5#
      • 1...Be4
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
      • 1...Bxf5+!
    • 1.Qxb7?
      • threat
        • 2.Qf3#
      • 1...Bxf5+
        • 2.Re6#
      • 1...Kxf5
        • 2.Qf7#
      • 1...Be4
        • 2.Qxe4#
      • 1...Be2
        • 2.Qe4#
      • 1...Ba6!
    • 1.Qe7?
      • threat
        • 2.Qg5#
        • 2.Qe5#
      • 1...Kxf5
        • 2.Qg5#
        • 2.Qf6#
        • 2.Qf7#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bxf5+!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe5#
      • 1...Bxf5+
        • 2.Re6#
      • 1...Kxf5
        • 2.Qf6#
      • 1...Be4
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);OGATEB,P-FLIGHT,XP(D)::QAR2(F)
    • B(a);CHECK,SBLOCK,XP(D)::QAB(F)+P(E)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,XP(D)::QAR2(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,XP(D)::QAR2(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,XP(D)::QAR2(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,XP(D)::QAR2(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(F),XB(a)
      • Refutation
        • B(a);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Refutation
        • B(a);CHECK,XP(D)
    • Try
      • Q(F);XP(d)
      • Threat
        • QAR1(F)
      • Vars
        • B(a);CHECK,SBLOCK,XP(D)::B(A)+R(B)
        • K(c);OGATEB,P-FLIGHT,XP(D)::QAR2(F)
        • B(a);N_GUARD::QAR1(F),XB(a)
        • B(a);N_GUARD::QAR1(F)
      • Refutation
        • B(a);P_PINQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::QAR1(F),XB(a)
      • Refutation
        • B(a);CHECK,XP(D)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • B(a);CHECK,SBLOCK,XP(D)::B(A)+R(B)
      • K(c);OGATEB,P-FLIGHT,XP(D)::QAR1(F)
      • B(a);SBLOCK::B(A)+R(B),DCHECK
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