MESON Chess Problem Database

Problem Display
PID: 108406 (8/3B4/2N5/3N4/1p1pkp2/1K6/8/6Q1 w - - 0 1)

Hawkins, Xenophon

La Presse, 1898

8/3B4/2N5/3N4/1p1pkp2/1K6/8/6Q1

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qxd4#
    • 1...f3
      • 2.Qxd4#
  • Tries
    • 1.Sf6+?
      • 1...Kf3
        • 2.Sxd4#
        • 2.Bg4#
      • 1...Kd3!
    • 1.Bg4?
      • threat
        • 2.Qxd4#
      • 1...Kd3
        • 2.Qxd4#
      • 1...d3
        • 2.Sf6#
        • 2.Qd4#
      • 1...Kxd5!
    • 1.Qd1?
      • 1...Kxd5
        • 2.Qxd4#
      • 1...f3
        • 2.Qxd4#
      • 1...d3!
    • 1.Qe1+?
      • 1...Kd3
        • 2.Sdxb4#
        • 2.Sxf4#
        • 2.Scxb4#
        • 2.Se5#
        • 2.Bf5#
      • 1...Kxd5
        • 2.Qe5#
      • 1...Kf3!
    • 1.Qg2+?
      • 1...Kd3
        • 2.Scxb4#
        • 2.Se5#
        • 2.Bf5#
        • 2.Qc2#
      • 1...f3!
  • Keys
    • 1.Qf2!
      • 1...Kd3
        • 2.Bf5#
        • 2.Qc2#
      • 1...Kxd5
        • 2.Qxd4#
      • 1...d3
        • 2.Sf6#
      • 1...f3
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XS(C)::QAR1(A),XP(b)
    • P(d);SBLOCK::QAR1(A),XP(b)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(E);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XS(C)
    • Try
      • Q(A);
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT,XS(C)::QAR1(A),XP(b)
        • P(d);SBLOCK::QAR1(A),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XS(C)::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT,XS(C)::QAR1(A),XP(b)
      • P(b);SBLOCK::S(C)
      • P(d);SBLOCK::QAR1(A),XP(b)
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