MESON Chess Problem Database

Problem Display
PID: 240612 (8/2p2n2/4N3/1Q6/R2P2kP/4p3/6K1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1978

8/2p2n2/4N3/1Q6/R2P2kP/4p3/6K1/8

#2

6 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sd6
      • 2.Qg5#
    • 1...Sh6
      • 2.Qg5#
    • 1...Sd8
      • 2.Qg5#
    • 1...Sh8
      • 2.Qg5#
  • Tries
    • 1.Qe2+?
      • 1...Kxh4
        • 2.d5#
      • 1...Kf5!
    • 1.Qe5?
      • threat
        • 2.d5#
      • 1...Kxh4
        • 2.d5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd6
        • 2.Qg5#
      • 1...c5
        • 2.dxc5#
      • 1...Sxe5!
    • 1.Qf5+?
      • 1...Kxh4
        • 2.Qh3#
        • 2.d5#
      • 1...Kxf5!
  • Keys
    • 1.Sg7!
      • threat
        • 2.d5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxh4
        • 2.Qh5#
      • 1...Se5
        • 2.dxe5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sd6
        • 2.Qg5#
      • 1...c5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(d);N_GUARD::QAR1(E),XS(d)
    • S(d);N_GUARD::QAR1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(D)::R(B)+P(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • R(B)+P(C)
      • Vars
        • K(b);P-FLIGHT,XP(D)::R(B)+P(C)
        • S(d);N_GUARD::QAR1(E),XS(d)
        • S(d);N_GUARD::QAR1(E)
        • P(c);OGATE::R(B)+P(C),XP(c)
      • Refutation
        • S(d);XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(E)
  • Actual
    • S(F);
    • Threat
      • R(B)+P(C)
    • Vars
      • K(b);P-FLIGHT::QAR1(E)
      • K(b);P-FLIGHT,XP(D)::QAR1(E)
      • S(d);OGATE::R(B)+P(C),XS(d)
      • S(d);N_GUARD::QAR1(E),XS(d)
      • S(d);N_GUARD::QAR1(E)
      • P(c);OGATE::R(B)+P(C),XP(c)
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