MESON Chess Problem Database

Problem Display
PID: 240724 (4r3/3PknKP/1Q1R4/2p1nR2/8/7B/4b3/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1999

4r3/3PknKP/1Q1R4/2p1nR2/8/7B/4b3/8

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8+
      • 2.hxg8S#
    • 1...Sd3
      • 2.Rxf7#
    • 1...Sf3
      • 2.Rxf7#
    • 1...Sc4
      • 2.Rxf7#
    • 1...Sg4
      • 2.Rxf7#
    • 1...Sg6
      • 2.Rxf7#
    • 1...Sxd7
      • 2.Rxf7#
      • 2.Re6#
    • 1...Sxd6
      • 2.Rxe5#
    • 1...Sh6
      • 2.Rxe5#
    • 1...Sh8
      • 2.Rxe5#
  • Tries
    • 1.Rd2?
      • threat
        • 2.Qf6#
      • 1...Rg8+
        • 2.hxg8S#
      • 1...Sxd7
        • 2.Rxf7#
      • 1...Sd3
        • 2.Rxf7#
      • 1...Sc6
        • 2.Rxf7#
      • 1...Sd6
        • 2.Rxe5#
      • 1...Sg4
        • 2.Rxf7#
      • 1...Bd3!
    • 1.Rd3?
      • threat
        • 2.Qf6#
      • 1...Rg8+
        • 2.hxg8S#
      • 1...Sxd3
        • 2.Rxf7#
      • 1...Sxd7
        • 2.Rxf7#
      • 1...Sc6
        • 2.Rxf7#
      • 1...Sd6
        • 2.Rxe5#
      • 1...Sg4
        • 2.Rxf7#
      • 1...Bxd3!
    • 1.Rd4?
      • threat
        • 2.Qf6#
      • 1...Rg8+
        • 2.hxg8S#
      • 1...Sxd7
        • 2.Rxf7#
      • 1...Sc6
        • 2.Rxf7#
      • 1...Sd6
        • 2.Rxe5#
      • 1...Sg4
        • 2.Rxf7#
      • 1...cxd4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qf6#
      • 1...Rg8+
        • 2.hxg8S#
      • 1...Sxd7
        • 2.Rxf7#
      • 1...Sc6
        • 2.Rxf7#
      • 1...Sd6
        • 2.Rfxe5#
      • 1...Sg4
        • 2.Rxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(f);CHECK,OGATE::PXR(f)=S
    • S(c);N_GUARD::R1(B),XS(e)
    • S(e);N_GUARD,XR(D)::R(B),XS(c)
    • S(e);N_GUARD::R(B),XS(c)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAB1(C)
      • Vars
        • R(f);CHECK,OGATE::PXR(f)=S
        • S(c);N_GUARD,XP(E)::R1(B),XS(e)
        • S(c);N_GUARD::R1(B),XS(e)
        • S(e);N_GUARD::R(B),XS(c)
      • Refutation
        • B(a);
    • Try
      • R(D);
      • Threat
        • QAB1(C)
      • Vars
        • R(f);CHECK,OGATE::PXR(f)=S
        • S(c);N_GUARD,XR(D)::R1(B),XS(e)
        • S(c);N_GUARD,XP(E)::R1(B),XS(e)
        • S(c);N_GUARD::R1(B),XS(e)
        • S(e);N_GUARD::R(B),XS(c)
      • Refutation
        • B(a);XR(D)
    • Try
      • R(D);
      • Threat
        • QAB1(C)
      • Vars
        • R(f);CHECK,OGATE::PXR(f)=S
        • S(c);N_GUARD,XP(E)::R1(B),XS(e)
        • S(c);N_GUARD::R1(B),XS(e)
        • S(e);N_GUARD::R(B),XS(c)
      • Refutation
        • P(b);XR(D)
  • Actual
    • R(D);
    • Threat
      • QAB1(C)
    • Vars
      • R(f);CHECK,OGATE::PXR(f)=S
      • S(c);N_GUARD,XP(E)::R1(B),XS(e)
      • S(c);N_GUARD::R1(B),XS(e)
      • S(e);N_GUARD::R(B),XS(c)
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