MESON Chess Problem Database

Problem Display
PID: 108784 (8/r2PN2K/1NQpk1pR/p5p1/4b1r1/2B3P1/4R3/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1985

8/r2PN2K/1NQpk1pR/p5p1/4b1r1/2B3P1/4R3/8

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sbc8?
      • threat
        • 2.d8S#
      • 1...Rxd7
        • 2.Qd5#
      • 1...Kf7!
    • 1.Qxd6+?
      • 1...Kf7
        • 2.Qf6#
      • 1...Kxd6!
  • Keys
    • 1.Sxg6!
      • threat
        • 2.Qd5#
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Kf5
        • 2.Se7#
      • 1...Kf7
        • 2.d8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • P=S
      • Vars
        • R(h);P_PINS(H),SBLOCK,XP(G)::QAB1(E)
      • Refutation
        • K(f);N_SPINB(a),N_SPINP(e),S_FLIGHT
    • Try
      • Q(E);CHECK,P_PINP(g),XP(e)
      • Vars
        • K(f);N_SPINB(a),N_SPINP(g),OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(f);N_SPINB(a),P-FLIGHT,XQ(E)
  • Actual
    • S(H);P_SPINP(G),P_SPINS(H),XP(g)
    • Threat
      • QAB1(E)
    • Vars
      • R(h);CHECK,OGATE,XP(G)::QAB1(E),XR(h)
      • K(f);N_PINS(H),N_SPINB(a),N_SPINP(e),S_FLIGHT::S(H)
      • K(f);N_PINP(G),N_SPINB(a),N_SPINP(e),S_FLIGHT::P=S
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