MESON Chess Problem Database

Problem Display
PID: 150116 (k7/1p1N4/1Q6/8/7r/2b3BR/2K5/8 w - - 0 1)

Dawson, Thomas Rayner

Pittsburgh Sun, 1924

(First published on Sat May 10 1924)

k7/1p1N4/1Q6/8/7r/2b3BR/2K5/8

#2

5 + 4

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qa5#
    • 1...Rd4
      • 2.Rh8#
    • 1...Ba1
      • 2.Qa5#
    • 1...Bb2
      • 2.Qa5#
    • 1...Ba5
      • 2.Qxa5#
    • 1...Be5
      • 2.Qa5#
    • 1...Bf6
      • 2.Qa5#
    • 1...Bg7
      • 2.Qa5#
    • 1...Bh8
      • 2.Qa5#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qxb7#
      • 1...Rb4
        • 2.Qa5#
      • 1...Rh7!
    • 1.Bb8?
      • threat
        • 2.Qa7#
      • 1...Bd4
        • 2.Ra3#
      • 1...Ra4!
  • Keys
    • 1.Bf2!
      • threat
        • 2.Qa7#
        • 2.Qd8#
      • 1...Ra4
        • 2.Qd8#
      • 1...Rc4
        • 2.Qa7#
      • 1...Rd4
        • 2.Rh8#
      • 1...Rh8
        • 2.Qa7#
      • 1...Bd4
        • 2.Ra3#
      • 1...Ba5
        • 2.Qxa5#
        • 2.Qa7#
      • 1...Be5
        • 2.Qa5#
        • 2.Qa7#
      • 1...Bf6
        • 2.Qa5#
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(b);S_CUTB(a)::QAR(D)
    • R(b);OGATE::R(C)
    • B(a);N_GUARD::QAR(D)
    • B(a);N_GUARD::QAR(D),XB(a)
    • B(a);N_GUARD,SBLOCK::QAR(D)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(D),XP(c)
      • Vars
        • R(b);S_CUTB(a)::QAR(D)
      • Refutation
        • R(b);
    • Try
      • B(B);
      • Threat
        • QAR1(D)
      • Vars
        • B(a);OGATE::R(C)
      • Refutation
        • R(b);
  • Actual
    • B(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);::QAR(D)
      • R(b);::QAR1(D)
      • R(b);OGATE::R(C)
      • B(a);OGATE::R(C)
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