MESON Chess Problem Database

Problem Display
PID: 243324 (8/1N1krP2/2R1R3/BP6/8/b7/2r1nQ1K/8 w - - 0 1)

Andersson, Sven Tore

Sachove umeni (Ceskoslovensky sach), 1965

8/1N1krP2/2R1R3/BP6/8/b7/2r1nQ1K/8

#2

8 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Red6#
    • 1...Re8
      • 2.fxe8Q#
      • 2.fxe8B#
    • 1...Bc1
      • 2.Red6#
    • 1...Bb2
      • 2.Red6#
    • 1...Bd6+
      • 2.Rexd6#
  • Tries
    • 1.Sc5+?
      • 1...Rxc5
        • 2.Red6#
      • 1...Bxc5!
    • 1.Rxe7+?
      • 1...Bxe7
        • 2.Qf5#
      • 1...Kxe7!
    • 1.Qd4+?
      • 1...Bd6+
        • 2.Rexd6#
        • 2.Qxd6#
      • 1...Sxd4+!
  • Keys
    • 1.Sd6!
      • threat
        • 2.f8S#
      • 1...Bxd6+
        • 2.Rexd6#
      • 1...Kxe6
        • 2.Qf5#
      • 1...Rxe6
        • 2.Qa7#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Re8
        • 2.fxe8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(a);S_CUTB(c)::R1(F)
    • R(e);OGATE::PXR(e)=Q
    • B(c);N_GUARD::R1(F)
    • B(c);CHECK,N_GUARD::R1(F),XB(c)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • R(a);XS(G)::R1(F)
      • Refutation
        • B(c);XS(G)
    • Try
      • R(F);CHECK,XR(e)
      • Vars
        • B(c);SBLOCK,XR(F)::QAB(A)
      • Refutation
        • K(d);P-FLIGHT,XR(F)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(b);CHECK,XQ(A)
  • Actual
    • S(G);
    • Threat
      • P=S
    • Vars
      • B(c);CHECK,OGATE,XS(G)::R1(F),XB(c)
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
      • R(e);SBLOCK,XR(F)::QAR(A)
      • R(e);OGATE,XP(H)::QAR2(A),XR(e)
      • R(e);OGATE::PXR(e)=Q
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