MESON Chess Problem Database

Problem Display
PID: 265109 (2b5/3pQ1p1/B5n1/R2PN2p/3kp1pR/2p3K1/5P2/4B3 w - - 0 1)

Evans, TC

Sunday Referee, 1936

(First published on Sun Sep 27 1936)

2b5/3pQ1p1/B5n1/R2PN2p/3kp1pR/2p3K1/5P2/4B3

#2

9 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe5
      • 2.Qc5#
    • 1...e3
      • 2.Sf3#
    • 1...d6
      • 2.Sc6#
  • Tries
    • 1.Sxg6?
      • threat
        • 2.Qb4#
        • 2.Qc5#
        • 2.Qe5#
        • 2.Qxg7#
      • 1...e3
        • 2.Qb4#
        • 2.Qxe3#
        • 2.Qe5#
        • 2.fxe3#
      • 1...d6
        • 2.Qa7#
        • 2.Qxg7#
      • 1...Bxa6!
    • 1.Rxh5?
      • threat
        • 2.Qb4#
        • 2.Qc5#
      • 1...Bxa6
        • 2.Qc5#
      • 1...Sxe5
        • 2.Qc5#
        • 2.Qxe5#
      • 1...e3
        • 2.Qb4#
      • 1...d6
        • 2.Sc6#
        • 2.Qa7#
      • 1...Sxe7!
    • 1.Qd6?
      • threat
        • 2.Ra4#
      • 1...Sxe5
        • 2.Qc5#
        • 2.Qb6#
      • 1...Bxa6!
  • Keys
    • 1.Sf3+!
      • 1...exf3
        • 2.Qe3#
      • 1...gxf3
        • 2.Rxe4#
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(f);SBLOCK,XS(G)::QAB1(I)
    • P(c);N_GUARD,P_SPINP(d)::S(G)
    • P(g);N_GUARD::S(G)
  • Tries
    • Try
      • S(G);XS(f)
      • Threat
        • DUALS(4)
      • Refutation
        • B(i);XB(H)
    • Try
      • R(D);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(i);XB(H)::QAB1(I)
        • P(c);::QAR2(I)
      • Refutation
        • S(f);XQ(I)
    • Try
      • Q(I);
      • Threat
        • R(E)
      • Refutation
        • B(i);XB(H)
  • Actual
    • S(G);CHECK
    • Vars
      • P(c);OGATE,P_SPINP(d),XS(G)::QAB1(I)
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