MESON Chess Problem Database

Problem Display
PID: 264218 (2b5/NN4B1/1bprp3/4P3/p2kB1K1/r4P2/n1Q2P2/8 w - - 0 1)

Evans, TC

Sunday Referee, 1935

(First published on Sun May 19 1935)

2b5/NN4B1/1bprp3/4P3/p2kB1K1/r4P2/n1Q2P2/8

#2

9 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Qxd3#
    • 1...Rd5
      • 2.Sxc6#
    • 1...Rd7
      • 2.Sxc6#
    • 1...Rd8
      • 2.Sxc6#
    • 1...Ba5
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bc7
      • 2.Qc5#
    • 1...Bd8
      • 2.Qc5#
    • 1...Sc3
      • 2.Qd3#
    • 1...c5
      • 2.Sb5#
  • Tries
    • 1.Qd2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kc4!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qc4#
      • 1...exd5+
        • 2.e6#
      • 1...Kxd5
        • 2.Qe4#
      • 1...Rxd5
        • 2.Sxc6#
      • 1...cxd5
        • 2.Sb5#
      • 1...Rc3
        • 2.Qe4#
      • 1...Sc3
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::QAR1(A),XR(b)
    • R(g);N_GUARD::S(G),XP(f)
    • B(e);N_GUARD::QAB1(A)
    • B(e);N_GUARD::QAB1(A),XB(e)
    • S(a);S_CUTR(b)::QAR1(A)
    • P(f);N_GUARD::S(G)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(A),XR(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAR1(A)
    • Vars
      • P(h);CHECK,OGATE,SBLOCK,XB(D)::B(I)+P(F)
      • K(d);N_GUARD,P-FLIGHT,XB(D)::QAB1(A)
      • R(g);N_GUARD,SBLOCK,XB(D)::S(G),XP(f)
      • P(f);N_GUARD,SBLOCK,XB(D)::S(G)
      • R(b);SBLOCK::QAR1(A)
      • S(a);S_CUTR(b)::QAR2(A)
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