MESON Chess Problem Database

Problem Display
PID: 142133 (8/8/8/8/5K2/7p/4RN1k/3RQq2 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Suomen Shakki, 1995

8/8/8/8/5K2/7p/4RN1k/3RQq2

#2

5 + 3

259 Thema Danicum 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Qg1#
      • 2.Qh1#
    • 1...Qg2
      • 2.Sg4#
    • 1...Qg1
      • 2.Qxg1#
    • 1...Qh1
      • 2.Sxh1#
      • 2.Sg4#
      • 2.Qxh1#
    • 1...Qxf2+
      • 2.Rxf2#
      • 2.Qxf2#
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qg3#
      • 1...Qxf2+
        • 2.Rxf2#
      • 1...Kg1
        • 2.Qg3#
      • 1...Kg2
        • 2.Qg3#
      • 1...Qg2
        • 2.Sg4#
      • 1...Qg1
        • 2.Qxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_PINS(D)::S(D)
    • Q(a);N_PINS(D),OGATE::QAB1(B),XQ(a)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(D)::R(C),XQ(a)
      • K(b);P_SPINQ(a),S_FLIGHT::QAR2(B)
      • K(b);P-FLIGHT::QAR1(B)
      • Q(a);N_PINS(D)::S(D)
      • Q(a);N_GUARD,N_PINS(D)::QAR1(B),XP(c)
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