MESON Chess Problem Database

Problem Display
PID: 161706 (3K1b2/1p2p1p1/1k1pR1P1/2p5/1N3R2/8/Q2P4/5BB1 w - - 0 1)

Packa, Ladislav

Pravda, 1987

3K1b2/1p2p1p1/1k1pR1P1/2p5/1N3R2/8/Q2P4/5BB1

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Sc6?
      • 1...bxc6
        • 2.Rb4#
        • 2.Qa6#
      • 1...d5
        • 2.Sb4#
        • 2.Sd4#
        • 2.Se5#
        • 2.Sa7#
        • 2.Sxe7#
        • 2.Sb8#
        • 2.Rb4#
        • 2.Qb1#
        • 2.Qb3#
        • 2.Qb2#
        • 2.Qa5#
        • 2.Qa7#
      • 1...Kxc6!
    • 1.Ba6?
      • 1...bxa6
        • 2.Qxa6#
      • 1...Ka7!
    • 1.Rf2?
      • 1...c4
        • 2.Rf5#
      • 1...cxb4!
    • 1.Qc4?
      • threat
        • 2.Qxc5#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka7!
    • 1.d4?
      • threat
        • 2.dxc5#
      • 1...cxb4
        • 2.d5#
      • 1...cxd4
        • 2.Bxd4#
      • 1...c4!
  • Keys
    • 1.Rd4!
      • 1...cxb4
        • 2.Rdxd6#
      • 1...cxd4
        • 2.Bxd4#
      • 1...c4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT,P_SPINP(c),XS(E)
    • Try
      • B(A);
      • Vars
        • P(d);OGATE,XB(A)::QAR1(C),XP(d)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(F);N_PINP(a),P_PINP(c)
      • Vars
        • P(a);OGATEB::B(B)+R(F)
      • Refutation
        • P(a);XS(E)
    • Try
      • Q(C);
      • Threat
        • QAB1(C),XP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(D);N_PINP(a),P_PINP(c)
      • Threat
        • P(D),XP(a)
      • Vars
        • P(a);XS(E)::B(B)+P(D)
        • P(a);N_SPINP(c),OGATE,P_SPINP(a),XP(D)::B(B),XP(a)
      • Refutation
        • P(a);
  • Actual
    • R(F);N_PINP(a),P_PINP(c)
    • Vars
      • P(a);XS(E)::B(B)+R(F),DCHECK,XP(c)
      • P(a);N_SPINP(c),OGATE,P_SPINP(a),XR(F)::B(B),XP(a)
      • P(a);OGATEB::B(B)+R(F)
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