MESON Chess Problem Database

Problem Display
PID: 22051 (4B3/8/p7/k5qR/4Q1np/r1N4K/1N1BppP1/R2b4 w - - 0 1)

ten Cate, Pieter

2nd Prize, Western Morning News and Mercury, 1923/II

(First published on Sat Sep 29 1923)

4B3/8/p7/k5qR/4Q1np/r1N4K/1N1BppP1/R2b4

#2

9 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa1
      • 2.Sca4#
    • 1...Ra2
      • 2.Sca4#
    • 1...Ra4
      • 2.Scxa4#
    • 1...Bb3
      • 2.Sca4#
    • 1...Se3
      • 2.Sd5#
  • Tries
    • 1.Rxa3+?
      • 1...Ba4
        • 2.Scxa4#
      • 1...Kb6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Sc4#
      • 1...Kb6
        • 2.Sc4#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Se5
        • 2.Qc5#
      • 1...Bb3
        • 2.Sca4#
      • 1...Se3
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(d);N_PINS(E),N_SPINR(d),XR(A)::B(C)+S(E)
    • R(d);N_PINS(E)::B(C)+S(E)
    • R(d);N_PINS(E)::B(C)+S(E),XR(d)
    • B(a);N_PINS(E)::B(C)+S(E)
    • S(e);N_PINS(E)::B(C)+S(E)
  • Tries
    • Try
      • R(A);CHECK,N_SPINS(E),XR(d)
      • Vars
        • B(a);P_SPINB(a)::B(C)+S(E),XB(a)
      • Refutation
        • K(g);N_SPINQ(h),S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • S(B)
    • Vars
      • K(g);N_SPINQ(h),N_SPINR(d),S_FLIGHT::S(B)
      • Q(h);N_GUARD::QAR2(G),XQ(h)
      • S(e);N_SPINQ(h),S_CUTQ(h)::QAR2(G)
      • B(a);N_PINS(E)::B(C)+S(E)
      • S(e);N_PINS(E)::B(C)+S(E)
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