MESON Chess Problem Database

Problem Display
PID: 81563 (n5N1/6Q1/1p1kN1n1/1P5b/K3prP1/8/B6B/4r1b1 w - - 0 1)

Eaton, Vincent Lanius

The Field, 1952

(First published on Sat Apr 19 1952)

n5N1/6Q1/1p1kN1n1/1P5b/K3prP1/8/B6B/4r1b1

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Qd4#
    • 1...Bxh2
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Sh4
      • 2.Bxf4#
    • 1...Se5
      • 2.Qe7#
    • 1...Sf8
      • 2.Bxf4#
    • 1...Sh8
      • 2.Bxf4#
    • 1...Sc7
      • 2.Qxc7#
    • 1...e3+
      • 2.Qd4#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sb7#
      • 1...Kc5
        • 2.Sb7#
      • 1...Se7
        • 2.Qxe7#
      • 1...e3+!
    • 1.Bxf4+?
      • 1...Se5
        • 2.Bxe5#
        • 2.Qe7#
      • 1...Sxf4!
    • 1.Qd7+?
      • 1...Ke5
        • 2.Qd5#
      • 1...Kxd7!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Se8#
      • 1...e3+
        • 2.Se4#
      • 1...Ke5
        • 2.Se8#
      • 1...Sh4
        • 2.Bxf4#
      • 1...Se5
        • 2.Qf8#
      • 1...Se7
        • 2.Bxf4#
      • 1...Sf8
        • 2.Bxf4#
      • 1...Sh8
        • 2.Bxf4#
      • 1...Sc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(a);S_CUTB(b)::QAR2(G)
    • B(b);N_GUARD,N_SPINR(d),XB(B)::QAR2(G)
    • B(b);N_GUARD::QAR2(G),XB(b)
    • S(h);N_GUARD::B(B),XR(d)
    • S(h);N_GUARD,N_SPINR(d),SBLOCK::QAB1(G)
    • S(i);N_GUARD::QAB1(G),XS(i)
    • P(c);CHECK,S_CUTB(b)::QAR2(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • K(g);N_SPINR(d),S_FLIGHT::S(F)
        • S(h);N_GUARD::QAB1(G),XS(h)
      • Refutation
        • P(c);CHECK
    • Try
      • B(B);CHECK,XR(d)
      • Refutation
        • S(h);XB(B)
    • Try
      • Q(G);CHECK
      • Vars
        • K(g);OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • K(g);N_SPINR(d),P-FLIGHT,XQ(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • P(c);CHECK,S_CUTR(a)::S(H)
      • K(g);S_FLIGHT::QAB(G)+S(H)
      • S(h);N_GUARD::B(B),XR(d)
      • S(h);N_GUARD,N_SPINR(d),SBLOCK::QAB(G)
      • S(i);N_GUARD::QAB1(G),XS(i)
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