MESON Chess Problem Database

Problem Display
PID: 182527 (2N2r2/4p3/3Br3/1p1k2qR/5RB1/b1QPpK1p/4N3/8 w - - 0 1)

Geofth, Claude

2nd HM., Union des Problemistes de France (UPF), 1936

2N2r2/4p3/3Br3/1p1k2qR/5RB1/b1QPpK1p/4N3/8

#2

9 + 9

136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.dxe4#
    • 1...Rxd6
      • 2.Sxe7#
    • 1...Rxf4+
      • 2.Sxf4#
    • 1...Rxc8
      • 2.Rd4#
    • 1...Rd8
      • 2.Rd4#
    • 1...Re8
      • 2.Rd4#
    • 1...Rg8
      • 2.Rd4#
    • 1...Rh8
      • 2.Rd4#
    • 1...Bc1
      • 2.Qc5#
    • 1...Bb2
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bxd6
      • 2.Sb6#
    • 1...b4
      • 2.Qc4#
      • 2.Qc5#
    • 1...exd6
      • 2.Sb6#
  • Tries
    • 1.Rxg5+?
      • 1...Re5
        • 2.Rxe5#
      • 1...Rf5!
  • Keys
    • 1.Kg3!
      • threat
        • 2.Rd4#
      • 1...Rxd6
        • 2.Sxe7#
      • 1...Rxf4
        • 2.Sxf4#
      • 1...Bxd6
        • 2.Sb6#
      • 1...exd6
        • 2.Sb6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Qe5
        • 2.Bf3#
      • 1...Re4
        • 2.dxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(g);OGATE::P(C),XR(g)
    • R(g);N_GUARD,SBLOCK,XB(H)::S(I),XP(h)
    • R(i);CHECK,XR(E)::S(A),XR(i)
    • R(i);N_PINR(E),XS(I)::R1(E)
    • R(i);N_PINR(E)::R1(E)
    • B(a);N_GUARD::QAR1(B)
    • B(a);N_GUARD::QAR1(B),XB(a)
    • B(a);SBLOCK,XB(H)::S(I)
    • P(h);SBLOCK,XB(H)::S(I)
  • Tries
    • Try
      • R(G);CHECK,XQ(f)
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::R1(G),XR(g)
      • Refutation
        • R(i);P_SPINR(i)
  • Actual
    • K(D);N_SPINR(E),P-FLIGHT,P_SPINB(F)
    • Threat
      • R1(E)
    • Vars
      • R(g);N_GUARD,SBLOCK,XB(H)::S(I),XP(h)
      • R(i);XR(E)::S(A),XR(i)
      • B(a);P_PINR(E),SBLOCK,XB(H)::S(I)
      • P(h);SBLOCK,XB(H)::S(I)
      • B(a);N_GUARD::QAR1(B),XB(a)
      • Q(f);N_PINB(F),P_PINR(E)::B(F)
      • R(g);OGATE::P(C),XR(g)
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