MESON Chess Problem Database

Problem Display
PID: 19027 (k7/2K5/1P2N3/8/8/1N2pp2/6b1/5nQ1 w - - 0 1)

Williams, Philip Hamilton

Reading Observer, 1911

k7/2K5/1P2N3/8/8/1N2pp2/6b1/5nQ1

#2

5 + 5

2638 White to Play 1913
3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Qg8#
    • 1...Bh3
      • 2.Qg8#
    • 1...Sd2
      • 2.Qa1#
    • 1...Sh2
      • 2.Qa1#
    • 1...Sg3
      • 2.Qa1#
    • 1...e2
      • 2.b7#
    • 1...f2
      • 2.Qxg2#
  • Tries
    • 1.Sbd4?
      • 1...Sd2
        • 2.Qa1#
      • 1...Bh1
        • 2.Qg8#
      • 1...Bh3
        • 2.Qg8#
      • 1...Sh2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...f2
        • 2.Qxg2#
      • 1...e2!
    • 1.Sbc5?
      • 1...Sd2
        • 2.Qa1#
      • 1...Bh1
        • 2.Qg8#
      • 1...Bh3
        • 2.Qg8#
      • 1...Sh2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...f2
        • 2.Qxg2#
      • 1...e2!
    • 1.Sf4?
      • 1...Sd2
        • 2.Qa1#
      • 1...Bh1
        • 2.Qg8#
      • 1...Sh2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...e2
        • 2.b7#
      • 1...f2
        • 2.Qxg2#
      • 1...Bh3!
    • 1.Qh2?
      • threat
        • 2.Qh8#
      • 1...Bh3
        • 2.Qa2#
      • 1...Sxh2!
    • 1.Qxf1?
      • threat
        • 2.Qa6#
        • 2.Qa1#
      • 1...e2
        • 2.Qa1#
      • 1...Bxf1!
    • 1.Qh1?
      • threat
        • 2.Qh8#
      • 1...Bh3
        • 2.Qxf3#
      • 1...Sh2
        • 2.Qa1#
      • 1...Bxh1!
    • 1.Qxg2?
      • threat
        • 2.Qxf3#
        • 2.Qa2#
        • 2.Qg8#
      • 1...Sd2
        • 2.Qg8#
      • 1...Sh2
        • 2.Qa2#
        • 2.Qg8#
      • 1...Sg3
        • 2.Qa2#
      • 1...e2
        • 2.Qxf3#
        • 2.Qg8#
      • 1...fxg2!
  • Keys
    • 1.Sd2!
      • 1...Sxd2
        • 2.Qa1#
      • 1...exd2
        • 2.b7#
      • 1...Bh1
        • 2.Qg8#
      • 1...Bh3
        • 2.Qg8#
      • 1...Sh2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...e2
        • 2.b7#
      • 1...f2
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(b);OGATE::QAR(A)
    • S(a);OGATE::QAB(A)
    • P(c);::P(C)
    • P(d);OGATEB::QAB(A),XB(b)
  • Tries
    • Try
      • S(B);
      • Vars
        • S(a);OGATE::QAB(A)
        • B(b);OGATE::QAR(A)
        • P(d);OGATEB::QAB(A),XB(b)
      • Refutation
        • P(c);
    • Try
      • S(B);
      • Vars
        • S(a);OGATE::QAB(A)
        • B(b);OGATE::QAR(A)
        • P(d);OGATEB::QAB(A),XB(b)
      • Refutation
        • P(c);
    • Try
      • S(D);
      • Vars
        • S(a);OGATE::QAB(A)
        • B(b);OGATE::QAR(A)
        • P(c);::P(C)
        • P(d);OGATEB::QAB(A),XB(b)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);OGATE::QAR(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB(A)
      • Refutation
        • B(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);OGATE,P_SPINP(d)::QAB(A),XP(d)
        • S(a);OGATE::QAB(A)
      • Refutation
        • B(b);XQ(A)
    • Try
      • Q(A);P_PINP(d),XB(b)
      • Threat
        • DUALS(3)
      • Vars
        • S(a);::QAR(A)
      • Refutation
        • P(d);N_SPINP(d),XQ(A)
  • Actual
    • S(B);
    • Vars
      • S(a);OGATE,XS(B)::QAB(A)
      • P(c);XS(B)::P(C)
      • B(b);OGATE::QAR(A)
      • S(a);OGATE::QAB(A)
      • P(c);::P(C)
      • P(d);OGATEB::QAB(A),XB(b)
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