MESON Chess Problem Database

Problem Display
PID: 202888 (5N2/6BP/1PQR2Kp/2pPpnn1/2Pkbrrb/3p1Ppp/3PP3/8 w - e5 0 1)

Dawson, Thomas Rayner

Western Daily Mercury, 1920

(First published on Fri Feb 6 1920)

5N2/6BP/1PQR2Kp/2pPpnn1/2Pkbrrb/3p1Ppp/3PP3/8

#2

12 + 13

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qa4#
    • 1...Bxd5
      • 2.Qxd5#
  • Tries
    • 1.Se6+?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Sxe6+!
    • 1.Bxe5+?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Kxe5!
    • 1.e3+?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Sxe3+!
  • Keys
    • 1.dxe5 ep+!
      • 1...Kxc4
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINP(j),OGATEB,P-FLIGHT,P_SPINP(i),XP(D)::QAR2(G)
    • B(e);OGATE,P_SPINB(e),XP(E)::QAR1(G),XB(e)
  • Tries
    • Try
      • S(L);CHECK
      • Vars
        • K(d);N_SPINP(j),P-FLIGHT,P_SPINP(i),XP(D)::QAR2(G)
      • Refutation
        • S(l);CHECK,XS(L)
    • Try
      • B(J);CHECK,XP(j)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(i),XP(D)::QAR2(G)
      • Refutation
        • K(d);S_FLIGHT,XB(J)
    • Try
      • P(B);CHECK
      • Vars
        • K(d);N_SPINP(j),P-FLIGHT,P_SPINP(i),XP(D)::QAR2(G)
      • Refutation
        • S(k);CHECK,XP(B)
  • Actual
    • P(E);CHECK,EP,XP(j)
    • Vars
      • K(d);P-FLIGHT,P_SPINP(i),XP(D)::QAR2(G)
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