MESON Chess Problem Database

Problem Display
PID: 158685 (8/R7/n1P5/1p3Q2/1k1N4/1p6/1N6/K5B1 w - - 0 1)

Corrias, Antonio G

British Chess Magazine 13. Ty., 1906-1907

8/R7/n1P5/1p3Q2/1k1N4/1p6/1N6/K5B1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qxb5#
  • Tries
    • 1.Sxb5?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sc7
        • 2.Ra4#
        • 2.Qc5#
      • 1...Sb8
        • 2.Ra4#
        • 2.Qc5#
      • 1...Ka5!
    • 1.Qxb5+?
      • 1...Ka3
        • 2.Sc4#
        • 2.Rxa6#
        • 2.Qa4#
        • 2.Qxb3#
        • 2.Qa5#
        • 2.Qc5#
      • 1...Kc3!
  • Keys
    • 1.Qe4!
      • 1...Ka3
        • 2.Sxb5#
      • 1...Kc3
        • 2.Qe1#
      • 1...Ka5
        • 2.Sxb3#
      • 1...Kc5
        • 2.Sf5#
      • 1...Sc5
        • 2.Qe1#
      • 1...Sc7
        • 2.Se2#
      • 1...Sb8
        • 2.Se2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINP(c),P_SPINS(d),S_FLIGHT::QAR1(E),XP(c)
  • Tries
    • Try
      • S(D);XP(c)
      • Vars
        • S(d);N_GUARD::QAB1(E),XS(d)
      • Refutation
        • K(b);P_SPINS(d),S_FLIGHT
    • Try
      • Q(E);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);P_SPINS(d),S_FLIGHT::S(D),XP(c)
      • K(b);S_FLIGHT::QAB(E)
      • K(b);P_SPINS(d),S_FLIGHT::S(D),XP(a)
      • K(b);S_FLIGHT::B(B)+S(D)
      • S(d);SBLOCK::QAB(E)
      • S(d);::QAR(E)+S(D)
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