MESON Chess Problem Database

Problem Display
PID: 69144 (8/8/8/8/5R1K/2N5/P2kpp2/1QbN2B1 w - - 0 1)

Ouellet, Charles

Themes-64, 1985

8/8/8/8/5R1K/2N5/P2kpp2/1QbN2B1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...e1Q
      • 2.Rd4#
    • 1...e1S
      • 2.Rxf2#
    • 1...e1B
      • 2.Rd4#
    • 1...e1R
      • 2.Rd4#
  • Tries
    • 1.Qc2+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kxc2!
    • 1.Qd3+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kxd3!
    • 1.Qxc1+?
      • 1...Ke1
        • 2.Sb2#
        • 2.Sxf2#
        • 2.Se3#
      • 1...Kd3
        • 2.Sb2#
        • 2.Sxf2#
      • 1...Kxc1!
    • 1.Qb2+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...Kd3
        • 2.Qxe2#
      • 1...Bxb2!
  • Keys
    • 1.Sxf2!
      • 1...Ke1
        • 2.Qxc1#
      • 1...Kxc3
        • 2.Qxc1#
      • 1...Ke3
        • 2.Qxc1#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Sfe4#
      • 1...e1B
        • 2.Qd3#
      • 1...e1R
        • 2.Qd3#
      • 1...Bb2
        • 2.Sfe4#
      • 1...Ba3
        • 2.Sfe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R(F)
    • P(c);OGATEB,SBLOCK::R(F),XP(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK,XB(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A),XP(c)
        • K(b);OGATE,P-FLIGHT::QAB1(A),XP(c)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • S(B);XP(d)
    • Vars
      • K(b);P_SPINB(a),S_FLIGHT::QAR2(A),XB(a)
      • K(b);S_FLIGHT,XS(E)::QAR2(A),XB(a)
      • K(b);S_FLIGHT::QAB(A),XB(a)
      • P(c);P_PINS(B),SBLOCK::QAR1(A)
      • P(c);SBLOCK::S(B)
      • P(c);SBLOCK::QAR1(A)
      • B(a);::S(B)
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