MESON Chess Problem Database

Problem Display
PID: 58011 (3N4/8/B1ppp3/1r1kN2K/2RPR1P1/8/1P3P2/3Q4 w - - 0 1)

Jespersen, Karl Lorenz Jesper

British Chess Magazine, 1884

3N4/8/B1ppp3/1r1kN2K/2RPR1P1/8/1P3P2/3Q4

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qf3#
    • 1...Rc5
      • 2.dxc5#
    • 1...c5
      • 2.dxc5#
    • 1...dxe5
      • 2.dxe5#
  • Tries
    • 1.Bxb5?
      • threat
        • 2.Bxc6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...dxe5
        • 2.dxe5#
      • 1...c5
        • 2.Bc6#
        • 2.dxc5#
      • 1...cxb5!
    • 1.Qf3?
      • threat
        • 2.Re1#
        • 2.Re2#
        • 2.Re3#
        • 2.Rf4#
      • 1...Rb3
        • 2.Re3#
      • 1...dxe5!
    • 1.Qh1?
      • threat
        • 2.Re1#
        • 2.Re2#
        • 2.Re3#
        • 2.Rf4#
      • 1...Rb3
        • 2.Re3#
      • 1...dxe5!
  • Keys
    • 1.Sd7!
      • 1...Kxc4+
        • 2.d5#
      • 1...Kxe4+
        • 2.d5#
      • 1...Rxb2
        • 2.Sf6#
      • 1...Rb3
        • 2.Sf6#
      • 1...Rb4
        • 2.Sf6#
      • 1...Ra5
        • 2.Sf6#
      • 1...Rc5
        • 2.Sf6#
        • 2.dxc5#
      • 1...Rb6
        • 2.Sf6#
      • 1...Rb7
        • 2.Sf6#
      • 1...Rb8
        • 2.Sf6#
      • 1...c5
        • 2.dxc5#
      • 1...e5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,P_PINS(H),S_FLIGHT,XR(F)::QAB1(A)
    • R(a);OGATE::QAR(A)+P(E),XR(a)
    • P(c);OGATE::QAR(A)+P(E),XP(c)
    • P(d);OGATE,XS(H)::QAR(A)+P(E),XP(d)
  • Tries
    • Try
      • B(J);XR(a)
      • Threat
        • B(J),XP(c)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
        • P(d);OGATE,XS(H)::QAR(A)+P(E),XP(d)
      • Refutation
        • P(c);XB(J)
    • Try
      • Q(A);
      • Threat
        • DUALS(4)
      • Vars
        • R(a);::QAB(A)+R(F)
      • Refutation
        • P(d);XS(H)
    • Try
      • Q(A);
      • Threat
        • DUALS(4)
      • Vars
        • R(a);::QAB(A)+R(F)
      • Refutation
        • P(d);XS(H)
  • Actual
    • S(H);
    • Vars
      • K(b);CHECK,OGATE,P_SPINR(a),S_FLIGHT,XR(D)::R(F)+P(E)
      • K(b);CHECK,OGATE,S_FLIGHT,XR(F)::R(D)+P(E)
      • R(a);XP(B)::S(H)
      • R(a);::S(H)
      • P(c);OGATE::QAR(A)+P(E),XP(c)
      • P(e);OGATE::QAR(A)+P(E),XP(e)
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