MESON Chess Problem Database

Problem Display
PID: 22005 (8/8/2p5/2B5/8/8/2K1kpQ1/4b3 w - - 0 1)

Lester, William Edward

Empire Review, 1923

8/8/2p5/2B5/8/8/2K1kpQ1/4b3

#2

3 + 4

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qxf2#
    • 1...Bc3
      • 2.Qxf2#
    • 1...Bb4
      • 2.Qxf2#
    • 1...Ba5
      • 2.Qxf2#
  • Tries
    • 1.Bd4?
      • 1...Bd2
        • 2.Qxf2#
      • 1...Bc3
        • 2.Qxf2#
      • 1...Bb4
        • 2.Qxf2#
      • 1...Ba5
        • 2.Qxf2#
      • 1...c5!
    • 1.Bb6?
      • 1...Bd2
        • 2.Qxf2#
      • 1...Bc3
        • 2.Qxf2#
      • 1...Bb4
        • 2.Qxf2#
      • 1...Ba5
        • 2.Qxf2#
      • 1...c5!
    • 1.Ba7?
      • 1...Bd2
        • 2.Qxf2#
      • 1...Bc3
        • 2.Qxf2#
      • 1...Bb4
        • 2.Qxf2#
      • 1...Ba5
        • 2.Qxf2#
      • 1...c5!
    • 1.Qg3?
      • threat
        • 2.Qd3#
      • 1...Bd2
        • 2.Qxf2#
      • 1...Bc3
        • 2.Qxf2#
      • 1...Bb4
        • 2.Qxf2#
      • 1...Ba5
        • 2.Qxf2#
      • 1...Kf1!
  • Keys
    • 1.Qh1!
      • 1...f1Q
        • 2.Qe4#
      • 1...f1S
        • 2.Qh5#
      • 1...f1B
        • 2.Qe4#
        • 2.Qh5#
      • 1...f1R
        • 2.Qe4#
      • 1...Bd2
        • 2.Qd1#
      • 1...Bc3
        • 2.Qd1#
      • 1...Bb4
        • 2.Qd1#
      • 1...Ba5
        • 2.Qd1#

This anticipates 22080(1924), 109519(1934), 179999(1952), 234085(1970), 102450(1988)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR1(B),XP(c)
  • Tries
    • Try
      • B(C);
      • Vars
        • B(a);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • B(a);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • P(d);
    • Try
      • B(C);
      • Vars
        • B(a);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • P(d);
    • Try
      • Q(B);N_PINP(c)
      • Threat
        • QAB1(B)
      • Vars
        • B(a);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);N_PINP(c)
    • Vars
      • P(c);SBLOCK::QAR2(B)
      • P(c);SBLOCK::QAB(B)
      • B(a);OGATE::QAB1(B)
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