MESON Chess Problem Database

Problem Display
PID: 231730 (6RK/8/8/8/1BQ5/8/5kp1/r4N2 w - - 0 1)

Clausen, Sigurd

Die Schwalbe, 1929

6RK/8/8/8/1BQ5/8/5kp1/r4N2

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Rf8#
  • Tries
    • 1.Bc5+?
      • 1...Kf3
        • 2.Sd2#
        • 2.Sh2#
        • 2.Rg3#
        • 2.Rf8#
        • 2.Qg4#
      • 1...Ke1!
    • 1.Rxg2+?
      • 1...Kf3
        • 2.Qg4#
      • 1...Kxg2!
    • 1.Qe2+?
      • 1...Kg1
        • 2.Qxg2#
      • 1...Kxe2!
    • 1.Qc2+?
      • 1...Kxf1
        • 2.Qxg2#
      • 1...Kg1
        • 2.Qxg2#
      • 1...Kf3!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qxg2#
      • 1...Kxf1
        • 2.Qxg2#
      • 1...Kg1
        • 2.Qxg2#
      • 1...Rxf1
        • 2.Bc5#
        • 2.Rxg2#
      • 1...gxf1Q
        • 2.Bc5#
      • 1...gxf1S
        • 2.Rg2#
      • 1...gxf1B
        • 2.Bc5#
      • 1...gxf1R
        • 2.Bc5#
        • 2.Rg2#
      • 1...g1Q
        • 2.Rf8#
      • 1...g1S
        • 2.Qg2#
      • 1...g1B
        • 2.Rf8#
        • 2.Qg2#
      • 1...g1R
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::R(D)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT,XR(D)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(c),S_FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT,XS(A)::QAB1(C),XP(c)
        • K(b);OGATE,P_SPINP(c),S_FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XP(c)
    • Vars
      • K(b);P-FLIGHT,XS(A)::QAB1(C),XP(c)
      • K(b);P_SPINP(c),S_FLIGHT::QAR1(C),XP(c)
      • P(c);SBLOCK,XS(A)::B(B)
      • P(c);SBLOCK,XS(A)::R1(D)
      • P(c);SBLOCK::R(D)
      • P(c);::QAR1(C)
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