MESON Chess Problem Database

Problem Display
PID: 55119 (2N2K2/6B1/2n1ppQp/3k4/Npp1R1P1/8/3nP3/3R4 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Mat, 1989

2N2K2/6B1/2n1ppQp/3k4/Npp1R1P1/8/3nP3/3R4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qxe6#
  • Tries
    • 1.Rxe6?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Rxd2#
        • 2.Qe4#
      • 1...Kxe6
        • 2.Qf5#
      • 1...Se5
        • 2.Rd6#
      • 1...f5
        • 2.Scb6#
      • 1...Sd4!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.Qe4#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Qh5#
      • 1...Sd4
        • 2.Rc5#
      • 1...e5
        • 2.Qf7#
      • 1...f5
        • 2.Sab6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(g);OGATE::QAB1(F),XP(f)
  • Tries
    • Try
      • R(D);XP(f)
      • Threat
        • QAB1(F)
      • Vars
        • K(d);N_SPINS(a),P_SPINP(g),S_FLIGHT,XR(D)::QAB1(F)
        • S(e);SBLOCK::R1(D)
        • P(g);::S(H)
      • Refutation
        • S(e);N_SPINS(a)
  • Actual
    • R(D);XP(c)
    • Threat
      • QAB1(F)
    • Vars
      • K(d);N_SPINS(a),S_FLIGHT,XR(D)::QAB1(F)
      • K(d);N_SPINS(a),P-FLIGHT,P_SPINP(g)::QAR(F)
      • S(e);N_SPINS(a),SBLOCK::R1(D)
      • P(f);OGATEB,SBLOCK::QAB(F)
      • P(g);::S(C)
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