MESON Chess Problem Database

Problem Display
PID: 147311 (K2n4/7Q/3pNpP1/3pkr2/R2N1R2/8/8/6n1 w - - 0 1)

Groeneveld, Cornelis

Canadian Chess Chat, 1984

K2n4/7Q/3pNpP1/3pkr2/R2N1R2/8/8/6n1

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe6
      • 2.Sc6#
  • Tries
    • 1.Sc6+?
      • 1...Kxe6
        • 2.Qe7#
      • 1...Sxc6!
    • 1.Sxd8?
      • threat
        • 2.S4c6#
      • 1...Rxf4
        • 2.Qe7#
      • 1...Kxf4!
    • 1.Qh4?
      • threat
        • 2.Rxf5#
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Rh5
        • 2.Qxf6#
      • 1...Rg5!
  • Keys
    • 1.Qe7!
      • 1...Rxf4
        • 2.Sxd8#
      • 1...Sxe6
        • 2.Sc6#
      • 1...Rg5
        • 2.Qxf6#
      • 1...Rh5
        • 2.Qxf6#
      • 1...Se2
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sh3
        • 2.Sf3#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sf7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD,SBLOCK,XS(D)::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(D)::QAR1(F)
      • Refutation
        • S(g);XS(B)
    • Try
      • S(D);XS(g)
      • Threat
        • S(B)
      • Vars
        • R(d);SBLOCK,XR(C)::QAR2(F)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(F);
      • Threat
        • R1(C),XR(d)
      • Vars
        • R(d);OGATE,XR(C)::QAB1(F),XR(d)
        • R(d);N_GUARD::QAB1(F),XP(f)
      • Refutation
        • R(d);
  • Actual
    • Q(F);
    • Vars
      • R(d);SBLOCK,XR(C)::QAR(F)+S(D),XS(g)
      • S(g);N_GUARD,P_SPINS(g),XS(D)::S(B)
      • R(d);N_GUARD::QAB1(F),XP(f)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
      • S(g);N_GUARD::S(B),XS(g)
      • S(g);N_GUARD::S(B)
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