MESON Chess Problem Database

Problem Display
PID: 150446 (8/8/5p2/4bQ1p/4N2k/8/6P1/5Kn1 w - - 0 1)

Dawson, Thomas Rayner

Pittsburgh Sun, 1925

(First published on Sat Sep 26 1925)

8/8/5p2/4bQ1p/4N2k/8/6P1/5Kn1

#2

4 + 5

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qf4#
      • 2.g3#
    • 1...Bb2
      • 2.Qf4#
      • 2.g3#
    • 1...Bc3
      • 2.Qf4#
      • 2.g3#
    • 1...Bd4
      • 2.Qf4#
      • 2.g3#
    • 1...Bf4
      • 2.Qxf4#
    • 1...Se2
      • 2.Qh3#
    • 1...Sf3
      • 2.Qh3#
    • 1...Sh3
      • 2.Qxh3#
  • Tries
    • 1.Qf2+?
      • 1...Bg3
        • 2.Qxg3#
      • 1...Kg4!
    • 1.Qxf6+?
      • 1...Kg4
        • 2.Qg5#
      • 1...Bxf6!
  • Keys
    • 1.g4!
      • threat
        • 2.Qxh5#
      • 1...Kh3
        • 2.Qxh5#
      • 1...hxg4
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(c);N_GUARD::QAR2(D),XB(c)
    • S(a);N_GUARD::QAR1(D)
    • S(a);N_GUARD::QAR1(D),XS(a)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(D),XB(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);CHECK,XP(e)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • B(c);XQ(D)
  • Actual
    • P(B);
    • Threat
      • QAR1(D),XP(d)
    • Vars
      • K(b);P-FLIGHT::QAR2(D),XP(d)
      • P(d);OGATEB,SBLOCK,XP(B)::QAR(D)
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