MESON Chess Problem Database

Problem Display
PID: 96796 (3B4/p2N2p1/2Kp4/8/3k4/6Q1/1p1N1n2/1B1n4 w - - 0 1)

Watson, Charles Gilbert Marriott

BCPS, 1918

3B4/p2N2p1/2Kp4/8/3k4/6Q1/1p1N1n2/1B1n4

#2

6 + 7

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Qxf2#
    • 1...Se3
      • 2.Qxg7#
    • 1...Sh1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qd3#
    • 1...Se4
      • 2.Qd3#
    • 1...Sg4
      • 2.Qd3#
    • 1...d5
      • 2.Qe5#
    • 1...a5
      • 2.Bb6#
    • 1...a6
      • 2.Bb6#
    • 1...g5
      • 2.Bf6#
    • 1...g6
      • 2.Bf6#
  • Tries
    • 1.Kxd6?
      • threat
        • 2.Qe5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sg4
        • 2.Qd3#
      • 1...Se4+!
    • 1.Sb6?
      • threat
        • 2.Sb3#
      • 1...axb6
        • 2.Bxb6#
      • 1...Se3
        • 2.Qxg7#
      • 1...Sd3!
    • 1.Sf8?
      • threat
        • 2.Se6#
      • 1...Se3
        • 2.Qxg7#
      • 1...Sd3!
    • 1.Qf4+?
      • 1...Kc3
        • 2.Ba5#
      • 1...Se4!
    • 1.Qxd6+?
      • 1...Kc3
        • 2.Ba5#
      • 1...Ke3!
    • 1.Qb3?
      • threat
        • 2.Sf3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc3!
  • Keys
    • 1.Qa3!
      • 1...Sc3
        • 2.Qxa7#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Se3
        • 2.Qxb2#
      • 1...Sh1
        • 2.Qd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Se4
        • 2.Qd3#
      • 1...Sg4
        • 2.Qd3#
      • 1...d5
        • 2.Qc5#
      • 1...a5
        • 2.Bb6#
      • 1...a6
        • 2.Bb6#
      • 1...g5
        • 2.Bf6#
      • 1...g6
        • 2.Bf6#

This anticipates 109764(1965)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,SBLOCK::QAB(C),XS(c)
    • S(a);SBLOCK::QAB(C),XP(g)
    • S(c);N_GUARD::QAR1(C)
    • S(c);N_GUARD::QAR1(C),XS(c)
    • P(e);N_GUARD::QAB1(C)
    • P(f);N_GUARD::B(F)
    • P(g);N_GUARD::B(F)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(e)
      • Threat
        • QAB1(C)
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
        • S(c);N_GUARD::QAR1(C)
      • Refutation
        • S(c);CHECK
    • Try
      • S(E);
      • Threat
        • S(B)
      • Vars
        • P(f);OGATE,XS(E)::B(F),XP(f)
        • S(a);SBLOCK::QAB(C),XP(g)
      • Refutation
        • S(c);
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(a);SBLOCK::QAB(C),XP(g)
      • Refutation
        • S(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT::B(F)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(C);CHECK,XP(e)
      • Vars
        • K(d);S_FLIGHT::B(F)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • S(c);N_GUARD::QAR1(C),XS(c)
      • Refutation
        • S(a);
  • Actual
    • Q(C);
    • Vars
      • S(a);SBLOCK::QAB(C),XP(f)
      • S(c);N_GUARD::QAR1(C),XS(c)
      • S(a);N_GUARD,SBLOCK::QAB(C),XP(b)
      • S(c);N_GUARD::QAR1(C)
      • P(e);N_GUARD::QAB1(C)
      • P(f);N_GUARD::B(F)
      • P(g);N_GUARD::B(F)
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