MESON Chess Problem Database

Problem Display
PID: 150333 (8/1N6/2p5/1n6/2kbRN2/8/PQ6/K7 w - - 0 1)

Dawson, Thomas Rayner

Chemnitzer Wochenschach (Allgemeine Zeitung Chemnitz), 1925

(First published on Sun Mar 8 1925)

8/1N6/2p5/1n6/2kbRN2/8/PQ6/K7

#2

6 + 4

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Rxd4#
    • 1...Sc3
      • 2.Qb3#
    • 1...Sd6
      • 2.Rxd4#
    • 1...Sa7
      • 2.Rxd4#
    • 1...Sc7
      • 2.Rxd4#
    • 1...c5
      • 2.Sa5#
  • Tries
    • 1.a4?
      • 1...Sa3
        • 2.Rxd4#
      • 1...Sd6
        • 2.Rxd4#
      • 1...Sa7
        • 2.Rxd4#
      • 1...Sc7
        • 2.Rxd4#
      • 1...c5
        • 2.Sa5#
      • 1...Sc3!
  • Keys
    • 1.a3!
      • 1...Sxa3
        • 2.Rxd4#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sd6
        • 2.Rxd4#
      • 1...Sa7
        • 2.Rxd4#
      • 1...Sc7
        • 2.Rxd4#
      • 1...c5
        • 2.Sa5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::R1(D),XB(b)
    • S(c);N_PINQ(C)::QAB1(C)
    • P(d);SBLOCK::S(F)
  • Tries
    • Try
      • P(B);
      • Vars
        • S(c);N_GUARD::R1(D),XB(b)
        • P(d);SBLOCK::S(F)
      • Refutation
        • S(c);N_PINQ(C)
  • Actual
    • P(B);
    • Vars
      • S(c);N_GUARD,XP(B)::R1(D),XB(b)
      • S(c);N_PINQ(C)::QAR1(C)
      • S(c);N_GUARD::R1(D),XB(b)
      • P(d);SBLOCK::S(F)
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