MESON Chess Problem Database

Problem Display
PID: 101347 (K7/8/8/2Np2R1/Bp1k4/8/2P2RbQ/6B1 w - - 0 1)

Hartong, Jan

Good Companions (April), 1919

K7/8/8/2Np2R1/Bp1k4/8/2P2RbQ/6B1

#2

8 + 4

6490 yacpdb 2009
14868 Pirnie Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qf4#
  • Tries
    • 1.Sb3+?
      • 1...Ke3
        • 2.Qf4#
      • 1...Kc4
        • 2.Qc7#
      • 1...Ke4
        • 2.Rf4#
        • 2.Re5#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kc3!
    • 1.Se6+?
      • 1...Ke3
        • 2.Qf4#
      • 1...Kc4
        • 2.Qc7#
      • 1...Ke4
        • 2.Rf4#
        • 2.Re5#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kc3!
    • 1.Qe5+?
      • 1...Kxc5
        • 2.Rf4#
      • 1...Kc4!
    • 1.c3+?
      • 1...Kxc3
        • 2.Rc2#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kxc5
        • 2.Qc7#
      • 1...bxc3
        • 2.Rf4#
      • 1...Kc4!
  • Keys
    • 1.c4!
      • threat
        • 2.Rc2#
      • 1...dxc4+
        • 2.Rf3#
      • 1...Kc3
        • 2.Rc2#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kxc4
        • 2.Rc2#
      • 1...Kxc5
        • 2.Rc2#
      • 1...bxc4 ep
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB1(D)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(D)
        • K(c);P-FLIGHT::QAR(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(D)
        • K(c);P-FLIGHT::QAR(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT,XS(F)::B(A)+R(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(B)::R1(C)
        • K(c);S_FLIGHT::QAB1(D)
        • K(c);P_SPINP(d),S_FLIGHT,XS(F)::QAR2(D)
        • P(b);SBLOCK,XP(B)::B(A)+R(C),DCHECK
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • P(B);
    • Threat
      • B(A)+R(C)
    • Vars
      • P(d);CHECK,SBLOCK,XP(B)::B(A)+R(C)
      • K(c);S_FLIGHT::R1(C)
      • K(c);S_FLIGHT::QAB1(D)
      • K(c);P-FLIGHT,XP(B)::R(C)
      • K(c);P_SPINP(d),S_FLIGHT,XS(F)::B(A)+R(C)
      • P(b);EP,XP(B)::B(A)+R(C),DCHECK
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