MESON Chess Problem Database

Problem Display
PID: 148567 (8/3p4/3K4/4P3/4k1pN/3pBr2/5P2/7Q w - - 0 1)

Dawson, Thomas Rayner

Magyar Sakkujsag, 1913

(First published on Thu Apr 10 1913)

8/3p4/3K4/4P3/4k1pN/3pBr2/5P2/7Q

#2

6 + 5

15256 TRD Scrapbook 2013

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Qb1#
    • 1...g3
      • 2.Qxf3#
  • Tries
    • 1.Qg2?
      • 1...g3
        • 2.Qxf3#
      • 1...d2!
    • 1.Qa1?
      • threat
        • 2.Qd4#
        • 2.Qa4#
        • 2.Qa8#
      • 1...Rxf2
        • 2.Qd4#
      • 1...Rxe3
        • 2.Qa4#
      • 1...d2
        • 2.Qd4#
        • 2.Qb1#
      • 1...Rf8
        • 2.Qd4#
        • 2.Qa4#
      • 1...Rf6+!
    • 1.e6?
      • 1...d2
        • 2.Qb1#
      • 1...g3
        • 2.Qxf3#
      • 1...dxe6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qh7#
      • 1...d2
        • 2.Qb1#
      • 1...g3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAB(A)
    • P(d);N_GUARD::QAB1(A),XR(b)
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(d);N_GUARD::QAB1(A),XR(b)
      • Refutation
        • P(a);
    • Try
      • Q(A);N_PINR(b)
      • Threat
        • DUALS(3)
      • Vars
        • R(b);XP(B)::QAR1(A)
        • R(b);XB(C)::QAR(A)
      • Refutation
        • R(b);CHECK
    • Try
      • P(E);
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(d);N_GUARD::QAB1(A),XR(b)
      • Refutation
        • P(e);XP(E)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(c);N_SPINR(b),OGATEB,S_FLIGHT,XS(D)::QAB(A)
      • P(a);OGATEB::QAB(A)
      • P(d);::S(D),XP(d)
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