MESON Chess Problem Database

Problem Display
PID: 133683 (B3RK1B/5N2/Q3P1p1/3r2p1/4k3/3Np1pP/3nprb1/5R2 w - - 0 1)

Brotherton, David WA

The Field, 1961

(First published on Thu Nov 23 1961)

B3RK1B/5N2/Q3P1p1/3r2p1/4k3/3Np1pP/3nprb1/5R2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sxg5#
    • 1...Rf5
      • 2.Sc5#
    • 1...Rxf7+
      • 2.exf7#
    • 1...Bf3
      • 2.Sd6#
    • 1...Sf3
      • 2.Sd6#
  • Tries
    • 1.Bxd5+?
      • 1...Kf5
        • 2.Sd6#
        • 2.Sh6#
      • 1...Kxd5!
    • 1.Qc4+?
      • 1...Kf3
        • 2.Se1#
        • 2.Sde5#
        • 2.Sfe5#
        • 2.Sxg5#
        • 2.Qg4#
      • 1...Kf5
        • 2.Sh6#
        • 2.Qg4#
      • 1...Sxc4!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxd5#
      • 1...Rxf7+
        • 2.exf7#
      • 1...Kf3
        • 2.Sxg5#
      • 1...Kf5
        • 2.Sd6#
      • 1...Rf5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(g);N_PINS(F),N_SPINR(h),P_SPINR(c),S_FLIGHT::S(F),XP(i)
    • R(c);::S(B)
    • R(c);CHECK,OGATE,XS(F)::R(H)+P(E),XR(c)
    • B(d);N_PINS(F),SBLOCK::S(F)
    • S(a);N_PINS(F),SBLOCK::S(F)
  • Tries
    • Try
      • B(G);CHECK,XR(h)
      • Refutation
        • K(g);S_FLIGHT,XB(G)
    • Try
      • Q(D);CHECK
      • Refutation
        • S(a);XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D),XR(h)
    • Vars
      • R(c);CHECK,OGATE,XS(F)::R(H)+P(E),XR(c)
      • K(g);N_PINS(F),N_SPINR(h),P_SPINR(c),S_FLIGHT::S(F),XP(i)
      • K(g);N_PINS(F),N_SPINR(h),P_SPINR(c),S_FLIGHT::S(F)
      • R(c);::S(B)
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