MESON Chess Problem Database

Problem Display
PID: 240648 (5K2/5Q2/2p3p1/n1R1N1pb/2p1k1r1/3p1Nr1/3P1R1B/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1982

5K2/5Q2/2p3p1/n1R1N1pb/2p1k1r1/3p1Nr1/3P1R1B/8

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb7
      • 2.Rxc4#
  • Tries
    • 1.Sxg5+?
      • 1...Rxg5
        • 2.Rf4#
        • 2.Qf4#
      • 1...Kd4!
    • 1.Sxc4?
      • threat
        • 2.Sd6#
        • 2.Re5#
      • 1...Sxc4
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...Sb7
        • 2.Re5#
      • 1...Rxf3!
    • 1.Sxg6?
      • threat
        • 2.Re5#
        • 2.Qe6#
        • 2.Qe8#
        • 2.Qf5#
        • 2.Qe7#
      • 1...Bxg6
        • 2.Re5#
      • 1...Rf4
        • 2.Re5#
      • 1...Rxf3!
    • 1.Qxc4+?
      • 1...Kf5
        • 2.Sh4#
        • 2.Sxg4#
        • 2.Sd7#
      • 1...Sxc4!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Se1#
        • 2.Sg1#
        • 2.Sd4#
        • 2.Sh4#
      • 1...Kf5
        • 2.Sd4#
        • 2.Sh4#
      • 1...cxd5!
    • 1.Qe6?
      • threat
        • 2.Sxg6#
      • 1...Rxf3+
        • 2.Sxf3#
      • 1...Rf4+
        • 2.Sf7#
      • 1...Kf4!
    • 1.Qxg6+?
      • 1...Kf4
        • 2.Se1#
        • 2.Sg1#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sxg5#
      • 1...Bxg6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Sxg6#
      • 1...Rxf3+
        • 2.Sxf3#
      • 1...Rf4+
        • 2.Sf7#
      • 1...Kf4
        • 2.Sxg5#
      • 1...Kf5
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD::R(E),XP(c)
  • Tries
    • Try
      • S(D);CHECK,XP(g)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(F);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::R1(E)
      • Refutation
        • R(b);P_PINQ(G),XS(D)
    • Try
      • S(F);XP(j)
      • Threat
        • DUALS(5)
      • Vars
        • B(h);XS(F)::R1(E)
        • R(e);P_PINQ(G)::R1(E)
      • Refutation
        • R(b);P_PINQ(G),XS(D)
    • Try
      • Q(G);CHECK,XP(c)
      • Refutation
        • S(f);XQ(G)
    • Try
      • Q(G);CHECK
      • Refutation
        • P(i);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR(G)+S(F),XP(j)
      • Vars
        • R(b);CHECK,XS(D)::QAR(G)+S(F),XR(b)
        • R(e);CHECK,SBLOCK::QAR(G)+S(F)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(b)
    • Try
      • Q(G);CHECK,XP(j)
      • Refutation
        • B(h);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+S(F),XP(j)
    • Vars
      • R(b);CHECK,XS(D)::QAR(G)+S(F),XR(b)
      • R(e);CHECK,SBLOCK::QAR(G)+S(F)
      • K(d);P-FLIGHT,P_SPINR(b)::R(B)+S(D),XP(g)
      • K(d);S_FLIGHT::R(E)+S(F),XP(a)
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