MESON Chess Problem Database

Problem Display
PID: 53444 (K2N2N1/3p4/p2P1r1q/4kp2/3R4/b6n/5p2/BQ6 w - - 0 1)

Laib, Kurt Friedrich

3rd HM., Schach, 1950/II

K2N2N1/3p4/p2P1r1q/4kp2/3R4/b6n/5p2/BQ6

#2

7 + 9

45 Schach 1951

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Sf7#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Sc6+?
      • 1...Ke6
        • 2.Qa2#
        • 2.Qb3#
      • 1...dxc6!
    • 1.Sf7+?
      • 1...Ke6
        • 2.Qa2#
        • 2.Qb3#
      • 1...Rxf7!
    • 1.Rc4+?
      • 1...Kd5
        • 2.Qd3#
      • 1...Kxd6
        • 2.Qd3#
      • 1...Bb2!
    • 1.Qa2?
      • threat
        • 2.Qd5#
      • 1...Rxd6
        • 2.Sf7#
      • 1...Sf4!
    • 1.Qd3?
      • threat
        • 2.Re4#
      • 1...f4
        • 2.Rd5#
        • 2.Qe4#
      • 1...Bb2!
    • 1.Qh1?
      • threat
        • 2.Qd5#
      • 1...Sf4
        • 2.Rd5#
      • 1...Rxd6!
    • 1.Qb5+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...axb5!
    • 1.Qb7?
      • threat
        • 2.Qd5#
      • 1...Rxd6
        • 2.Re4#
      • 1...Sf4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qd5#
      • 1...Rxd6
        • 2.Sf7#
      • 1...Sf4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD,SBLOCK::S(F)
    • P(e);N_GUARD::QAR1(B)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • P(i);XS(F)
    • Try
      • S(F);CHECK
      • Refutation
        • R(g);XS(F)
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR2(B)
        • K(d);S_FLIGHT,XP(D)::QAR(B)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(g);N_GUARD,XP(D)::S(F)
      • Refutation
        • S(c);
    • Try
      • Q(B);
      • Threat
        • B(A)+R(C),DCHECK
      • Refutation
        • B(b);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • S(c);SBLOCK::B(A)+R(C),DCHECK
      • Refutation
        • R(g);XP(D)
    • Try
      • Q(B);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(B),XB(b)
      • Refutation
        • P(f);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(g);SBLOCK,XP(D)::B(A)+R(C),DCHECK
      • Refutation
        • S(c);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • R(g);N_GUARD,XP(D)::S(F)
      • S(c);S_CUTQ(h)::QAR2(B)
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