MESON Chess Problem Database

Problem Display
PID: 240725 (3K4/4P3/1B6/4pP2/2B1kq2/5N1b/5RQ1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1999

3K4/4P3/1B6/4pP2/2B1kq2/5N1b/5RQ1/8

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qd2+
      • 2.Sxd2#
    • 1...Qh2
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qe3
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qg3
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qg5
      • 2.Sd2#
      • 2.Sxg5#
    • 1...Qh6
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qxf3
      • 2.Qxf3#
    • 1...Qg4
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qh4
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qxf5
      • 2.Sd2#
      • 2.Sg5#
    • 1...Bxf5
      • 2.Sd2#
      • 2.Sg5#
  • Tries
    • 1.Sd4+?
      • 1...Ke3
        • 2.Sc2#
        • 2.Re2#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Bxg2!
    • 1.Sh4+?
      • 1...Qf3
        • 2.Qxf3#
      • 1...Bxg2!
    • 1.Qg4?
      • threat
        • 2.Sd2#
        • 2.Sg5#
        • 2.Re2#
      • 1...Qxg4
        • 2.Sd2#
      • 1...Bf1
        • 2.Sd2#
        • 2.Sg5#
      • 1...Bxg4!
  • Keys
    • 1.e8S!
      • threat
        • 2.Sd6#
      • 1...Qd2+
        • 2.Sxd2#
      • 1...Qg5+
        • 2.Sxg5#
      • 1...Qh4+
        • 2.Sg5#
      • 1...Kxf5
        • 2.Sh4#
      • 1...Qxf3
        • 2.Qxf3#
      • 1...Qxf5
        • 2.Sd2#
        • 2.Sg5#
      • 1...Qc1
        • 2.Sd2#
        • 2.Sg5#
      • 1...Qh2
        • 2.Sd2#
        • 2.Sg5#
      • 1...Qe3
        • 2.Sd2#
        • 2.Sg5#
      • 1...Qg3
        • 2.Sd2#
        • 2.Sg5#
      • 1...Qh6
        • 2.Sd2#
        • 2.Sg5#
      • 1...Qg4
        • 2.Sd2#
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK::QAB(B)+S(C),DCHECK,XQ(c)
    • Q(c);OGATE,P_SPINQ(c),XS(C)::QAB1(B),XQ(c)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(B),XQ(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • S(C);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(B),XQ(c)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);P_PINQ(c)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);N_SPINQ(c),XQ(B)::S(C)
      • Refutation
        • B(a);N_SPINQ(c),XQ(B)
  • Actual
    • P(G);
    • Threat
      • S(G)
    • Vars
      • Q(c);CHECK::QAB(B)+S(C),DCHECK,XQ(c)
      • Q(c);CHECK::QAB(B)+S(C),DCHECK
      • K(b);S_FLIGHT,XP(E)::S(C)
      • Q(c);OGATE,P_SPINQ(c),XS(C)::QAB1(B),XQ(c)
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