MESON Chess Problem Database

Problem Display
PID: 101362 (1n1Q4/1N2BpP1/3p4/3P1k1b/8/2KPPNbp/2P2R2/5rR1 w - - 0 1)

Janet, Frank

Good Companions, 1919

1n1Q4/1N2BpP1/3p4/3P1k1b/8/2KPPNbp/2P2R2/5rR1

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Sh2#
    • 1...Bxf2
      • 2.Sxd6#
      • 2.Rg5#
    • 1...Bh2
      • 2.Rg5#
    • 1...Bf4
      • 2.e4#
    • 1...Bh4
      • 2.Sxd6#
    • 1...Be5+
      • 2.Sd4#
  • Tries
    • 1.Sh4+?
      • 1...Ke5
        • 2.Qxd6#
      • 1...Kg4!
    • 1.Sxd6+?
      • 1...Kg4
        • 2.Sh2#
        • 2.Se5#
      • 1...Bxd6
        • 2.Rg5#
      • 1...Kg6!
    • 1.Rxg3?
      • threat
        • 2.Sxd6#
        • 2.Rg5#
      • 1...Bxf3
        • 2.Rg5#
      • 1...Rg1
        • 2.Sxd6#
      • 1...f6
        • 2.Sxd6#
      • 1...Bg4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qxh5#
      • 1...Be5+
        • 2.Sd4#
      • 1...Kg4
        • 2.Sh2#
      • 1...Kg6
        • 2.Sh4#
      • 1...Bxf3
        • 2.Qh5#
      • 1...Bf4
        • 2.e4#
      • 1...Bh4
        • 2.Sxd6#
      • 1...Bg4
        • 2.Qh7#
      • 1...Bg6
        • 2.Qxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINB(b),S_FLIGHT::S(G)
    • B(b);OGATE::R1(A)
    • B(b);SBLOCK::P(F)
    • B(b);N_GUARD::S(I),XP(f)
    • B(b);CHECK,SBLOCK::R(C)+S(G),DCHECK
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(L),XP(f)
      • Refutation
        • K(d);P_SPINB(b),S_FLIGHT
    • Try
      • S(I);CHECK,XP(f)
      • Vars
        • B(b);OGATE,XS(I)::R1(A)
      • Refutation
        • K(d);P_SPINB(b),S_FLIGHT
    • Try
      • R(A);XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);P_SPINB(e),XS(G)::R1(A)
        • R(a);::S(I),XP(f)
        • P(g);::S(I),XP(f)
      • Refutation
        • B(e);
  • Actual
    • Q(L);
    • Threat
      • QAR2(L),XB(e)
    • Vars
      • B(b);CHECK,SBLOCK::R(C)+S(G),DCHECK
      • K(d);P_SPINB(b),S_FLIGHT::S(G)
      • B(e);P_SPINB(e),XS(G)::QAR2(L)
      • B(b);SBLOCK::P(F)
      • B(b);N_GUARD::S(I),XP(f)
      • B(e);N_GUARD,SBLOCK::QAB(L)
      • B(e);OGATE,SBLOCK::QAB(L),XP(c)
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