MESON Chess Problem Database

Problem Display
PID: 23698 (2K1bR1Q/b1NpR3/B3r3/4PPn1/1B1k1np1/3p4/3N1P2/8 w - - 0 1)

Groeneveld, Cornelis

Prins, Hendrik

2nd Comm., Troll, 1997-1998

2K1bR1Q/b1NpR3/B3r3/4PPn1/1B1k1np1/3p4/3N1P2/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Qxe5#
    • 1...Rxa6
      • 2.e6#
    • 1...Rb6
      • 2.e6#
    • 1...Rc6
      • 2.e6#
    • 1...Rd6
      • 2.exd6#
      • 2.e6#
    • 1...Sd5
      • 2.Sb5#
    • 1...Se4
      • 2.Sb3#
  • Tries
    • 1.Rxd7+?
      • 1...Rd6
        • 2.exd6#
        • 2.e6#
      • 1...Sd5
        • 2.Sb5#
        • 2.Rxd5#
      • 1...Bxd7+!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qa1#
      • 1...Kxe5
        • 2.Qh8#
      • 1...Rxa6
        • 2.Sb5#
      • 1...Rc6
        • 2.Sb3#
      • 1...Se2
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(f);OGATE,P_SPINR(f),XP(D)::QAB1(K),XR(f)
    • R(f);OGATE,XB(F)::QAB(K)+P(D)
    • R(f);OGATE::QAB(K)+P(D)
    • R(f);OGATE,P_PINS(G)::QAB(K)+P(D)
    • S(c);SBLOCK::S(G)
    • S(e);SBLOCK::S(A)
  • Tries
    • Try
      • R(H);CHECK,XP(h)
      • Refutation
        • B(i);CHECK,XR(H)
  • Actual
    • Q(K);
    • Threat
      • QAB(K)
    • Vars
      • K(b);OGATEB,P_SPINR(f),S_FLIGHT,XP(D)::QAB(K)
      • R(f);XB(F)::S(G)
      • R(f);P_PINS(G)::S(A)
      • S(c);N_GUARD::QAR1(K)
      • S(c);N_GUARD::QAR1(K),XS(c)
      • S(e);N_GUARD::QAR1(K),XS(e)
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