MESON Chess Problem Database

Problem Display
PID: 273731 (4q1b1/b3R1B1/3pnN2/r7/1PNk1p1R/pQ3prB/K4Pp1/8 w - - 0 1)

van Gool, Johann Christoffel

3rd Comm., Grunenwald/Monreal JT (diagrammes), 1978

4q1b1/b3R1B1/3pnN2/r7/1PNk1p1R/pQ3prB/K4Pp1/8

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Rxf4#
    • 1...Sxg7
      • 2.Rxf4#
    • 1...Sd8
      • 2.Rxf4#
    • 1...Sf8
      • 2.Rxf4#
  • Tries
    • 1.Sxa5?
      • threat
        • 2.Qe3#
      • 1...Ke5
        • 2.Qd5#
      • 1...Sxg7
        • 2.Rxf4#
      • 1...Sc5
        • 2.Sg4#
      • 1...Sg5
        • 2.Se4#
        • 2.Sg4#
        • 2.Sd5#
        • 2.Sh5#
        • 2.Sd7#
        • 2.Sh7#
        • 2.Sxe8#
        • 2.Sxg8#
      • 1...Sc7
        • 2.Sg4#
        • 2.Rxf4#
      • 1...Sd8
        • 2.Sg4#
        • 2.Rxf4#
      • 1...Sf8
        • 2.Sg4#
        • 2.Rxf4#
      • 1...Rg4!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qe3#
      • 1...Ke5
        • 2.Sd7#
      • 1...Sxg7
        • 2.Rxf4#
      • 1...Rg4
        • 2.Sxf3#
      • 1...Re5
        • 2.Qc4#
      • 1...Sc5
        • 2.Sg4#
      • 1...Sg5
        • 2.Sd5#
      • 1...Sc7
        • 2.Rxf4#
      • 1...Sd8
        • 2.Rxf4#
      • 1...Sf8
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(i);N_GUARD::R(G),XP(f)
    • S(i);N_GUARD,XB(J)::R(G),XP(f)
  • Tries
    • Try
      • S(F);XR(g)
      • Threat
        • QAB1(C)
      • Vars
        • K(e);N_GUARD,N_SPINP(f),P_SPINS(i),S_FLIGHT::QAR1(C)
        • S(i);N_GUARD,P_PINQ(C),XB(J)::R(G),XP(f)
        • S(i);N_GUARD,P_PINQ(C)::B(J)+S(H)
      • Refutation
        • R(d);N_SPINP(f)
  • Actual
    • S(F);
    • Threat
      • QAB1(C)
    • Vars
      • K(e);N_SPINP(f),P_SPINS(i),S_FLIGHT::B(J)+S(H),DCHECK
      • S(i);N_GUARD,P_PINQ(C),XB(J)::R(G),XP(f)
      • R(d);N_GUARD,N_SPINP(f)::S(F),XP(c)
      • R(g);SBLOCK::QAR1(C)
      • S(i);N_GUARD,P_PINQ(C),S_CUTR(g)::B(J)+S(H)
      • S(i);N_GUARD,P_PINQ(C),S_CUTR(d)::B(J)+S(H)
      • S(i);N_GUARD,P_PINQ(C)::R(G),XP(f)
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