MESON Chess Problem Database

Problem Display
PID: 261982 (1K1R4/pPBpp3/Rq2kpPb/4pp2/1N3P2/1r2Q3/B3P3/1r6 w - - 0 1)

ten Cate, Pieter

Problemnoter, 1958

1K1R4/pPBpp3/Rq2kpPb/4pp2/1N3P2/1r2Q3/B3P3/1r6

#2

11 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Bxb3+?
      • 1...d5
        • 2.Bxd5#
      • 1...Rxb3!
    • 1.Qd2?
      • threat
        • 2.Qd5#
        • 2.Qxd7#
      • 1...Qd6
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qd5#
      • 1...Rd1!
    • 1.Qc5?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Rd1!
    • 1.Qxb3+?
      • 1...d5
        • 2.Qxd5#
      • 1...Rxb3!
    • 1.Qd3?
      • threat
        • 2.Qd5#
        • 2.Qxd7#
      • 1...Qd6
        • 2.Qc4#
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qd5#
      • 1...Rd1!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Bc7#
      • 1...Qd6+
        • 2.Bxd6#
      • 1...Bxf4
        • 2.Bxf4#
      • 1...fxe5
        • 2.Qxe5#
      • 1...d5
        • 2.Bc3#
      • 1...d6
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK,XR(b)
      • Vars
        • P(j);N_SPINP(c),P_SPINP(j)::B(A),XP(j)
      • Refutation
        • R(a);XB(A)
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);N_PINP(H),P_PINB(I)::QAB1(C)
        • P(j);N_SPINR(b)::QAB1(C),XP(j)
        • P(j);N_SPINQ(e)::QAB1(C)
      • Refutation
        • R(a);
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • QAB1(C)
      • Vars
        • P(j);N_SPINR(b)::QAB1(C),XP(j)
      • Refutation
        • R(a);
    • Try
      • Q(C);CHECK,N_PINP(c),XR(b)
      • Vars
        • P(j);P_SPINP(j)::QAB1(C),XP(j)
      • Refutation
        • R(a);P_SPINR(a),XQ(C)
    • Try
      • Q(C);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(j);N_SPINR(b)::QAB1(C),XP(j)
        • P(j);N_SPINQ(e)::QAB1(C)
      • Refutation
        • R(a);
  • Actual
    • B(I);XP(c)
    • Threat
      • QAR(C)+B(I)
    • Vars
      • Q(e);CHECK,N_GUARD,N_PINP(H)::QAR(C)+B(I),XQ(e)
      • B(h);OGATE,P_PINB(I),XP(E)::QAR(C)+B(I),XB(h)
      • P(g);OGATE,P_SPINP(g),XB(I)::QAR1(C),XP(g)
      • P(j);N_SPINR(b)::QAR(C)+B(I)
      • P(j);N_SPINQ(e)::QAR(C)+B(I)
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