MESON Chess Problem Database

Problem Display
PID: 266268 (3N2K1/1np5/5B2/R1PkP3/6Q1/4b3/qppN4/6nb w - - 0 1)

Evans, TC

Sunday Referee, 1937

(First published on Sun Mar 7 1937)

3N2K1/1np5/5B2/R1PkP3/6Q1/4b3/qppN4/6nb

#2

8 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qc4#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qa1
      • 2.Qc4#
    • 1...Qa3
      • 2.Qc4#
    • 1...Qxa5
      • 2.Qc4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bd4
      • 2.Qe6#
    • 1...Sf3
      • 2.Qe4#
    • 1...Sxc5
      • 2.Qd7#
    • 1...Sxd8
      • 2.Qd7#
  • Keys
    • 1.Qf5!
      • threat
        • 2.e6#
      • 1...Kd4+
        • 2.e6#
      • 1...Bxd2
        • 2.Qd3#
      • 1...Bxc5
        • 2.Qd3#
      • 1...Sxc5
        • 2.Qd7#
      • 1...Sxd8
        • 2.Qd7#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bd4
        • 2.Qe6#
      • 1...Bf4
        • 2.Qd3#
      • 1...Sf3
        • 2.Qe4#
      • 1...Sd6
        • 2.exd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD::QAB1(B)
    • Q(c);N_GUARD::QAB1(B),XQ(c)
    • Q(c);N_GUARD,XR(C)::QAB1(B)
    • B(b);N_GUARD::QAB1(B),XB(b)
    • B(f);SBLOCK::QAB1(B)
    • S(a);S_CUTB(b)::QAB1(B)
    • S(h);N_GUARD,P_SPINS(h),XP(D)::QAR2(B)
    • S(h);N_GUARD,XS(G)::QAR2(B)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)+P(E)
    • Vars
      • K(g);CHECK,P-FLIGHT::B(F)+P(E)
      • B(f);N_GUARD,XS(A)::QAR2(B)
      • B(f);N_GUARD,P_SPINB(f),XP(D)::QAR2(B)
      • S(h);N_GUARD,P_SPINS(h),XP(D)::QAR2(B)
      • S(h);N_GUARD,XS(G)::QAR2(B)
      • B(b);N_GUARD::QAB1(B),XB(b)
      • B(f);SBLOCK::QAB1(B)
      • B(f);N_GUARD::QAR2(B)
      • S(a);S_CUTB(b)::QAB1(B)
      • S(h);OGATE::QAR(B)+P(E),XS(h)
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