MESON Chess Problem Database

Problem Display
PID: 96731 (8/2Q5/5K2/8/3kp3/4Nn2/1nP2P2/8 w - - 0 1)

Stewart, John

Stubbs, Arthur Goodwin

The Chess Problem, 1944

8/2Q5/5K2/8/3kp3/4Nn2/1nP2P2/8

#2

5 + 4

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
      • 2.c3#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Se1
      • 2.Qe5#
    • 1...Sg1
      • 2.Qe5#
    • 1...Sd2
      • 2.Qe5#
    • 1...Sh2
      • 2.Qe5#
    • 1...Sh4
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sg5
      • 2.Qe5#
  • Tries
    • 1.Kf5?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sd3
        • 2.Qc4#
        • 2.c3#
      • 1...Sa4
        • 2.Qc4#
      • 1...Se1
        • 2.Qe5#
      • 1...Sg1
        • 2.Qe5#
      • 1...Sd2
        • 2.Qe5#
      • 1...Sh2
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sg5
        • 2.Qe5#
      • 1...Sh4+!
    • 1.Ke6?
      • threat
        • 2.Sf5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sh4
        • 2.Qe5#
      • 1...Sg5+!
    • 1.Qc6?
      • threat
        • 2.Sf5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sh4!
  • Keys
    • 1.Qa5!
      • 1...Sd1
        • 2.Qb4#
      • 1...Sd3
        • 2.c3#
      • 1...Sa4
        • 2.Qb4#
      • 1...Sc4
        • 2.Sf5#
      • 1...Se1
        • 2.Qe5#
      • 1...Sg1
        • 2.Qe5#
      • 1...Sd2
        • 2.Qe5#
      • 1...Sh2
        • 2.Qe5#
      • 1...Sh4
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sg5
        • 2.Qe5#

This anticipates 88777(1993)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(E)
    • S(a);N_GUARD::QAR1(E),XS(a)
    • S(b);N_GUARD::QAB1(E)
    • S(b);N_GUARD::QAB1(E),XS(b)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAR1(E),XS(a)
        • S(a);N_GUARD::QAR1(E)
        • S(b);N_GUARD::QAB1(E)
        • S(b);N_GUARD::QAB1(E),XS(b)
      • Refutation
        • S(b);CHECK
    • Try
      • K(D);P-FLIGHT
      • Threat
        • S(C)
      • Vars
        • S(a);N_GUARD::QAR1(E),XS(a)
        • S(b);N_GUARD::QAB1(E)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(E);
      • Threat
        • S(C)
      • Vars
        • S(a);N_GUARD::QAR1(E),XS(a)
      • Refutation
        • S(b);
  • Actual
    • Q(E);
    • Vars
      • S(a);N_GUARD::QAR2(E)
      • S(a);SBLOCK::P(A)
      • S(a);SBLOCK::S(C)
      • S(b);N_GUARD::QAB1(E)
      • S(b);N_GUARD::QAB1(E),XS(b)
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