MESON Chess Problem Database

Problem Display
PID: 227042 (7Q/8/3p4/3p4/2RPR3/3k1p2/P2B3P/3K4 w - - 0 1)

Hermanson, Halvar

Schweizerische Schachzeitung, 1985

7Q/8/3p4/3p4/2RPR3/3k1p2/P2B3P/3K4

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qh7#
    • 1...dxc4
      • 2.Re3#
    • 1...dxe4
      • 2.Rc3#
  • Tries
    • 1.Rc1?
      • threat
        • 2.Re3#
      • 1...dxe4
        • 2.Rc3#
      • 1...Kxe4!
    • 1.Rc2?
      • threat
        • 2.Re3#
      • 1...dxe4
        • 2.Rc3#
      • 1...Kxe4!
    • 1.Ra4?
      • threat
        • 2.Re3#
      • 1...Kxe4
        • 2.Qh7#
      • 1...dxe4!
    • 1.Rb4?
      • threat
        • 2.Re3#
      • 1...Kxe4
        • 2.Qh7#
      • 1...dxe4!
    • 1.Rc6?
      • threat
        • 2.Re3#
      • 1...dxe4
        • 2.Rc3#
      • 1...Kxe4!
    • 1.Rc7?
      • threat
        • 2.Re3#
      • 1...dxe4
        • 2.Rc3#
      • 1...Kxe4!
    • 1.Rc8?
      • threat
        • 2.Re3#
      • 1...dxe4
        • 2.Rc3#
      • 1...Kxe4!
    • 1.Re1?
      • threat
        • 2.Rc3#
      • 1...dxc4
        • 2.Re3#
      • 1...Kxc4!
    • 1.Rf4?
      • threat
        • 2.Rc3#
      • 1...dxc4
        • 2.Qh7#
      • 1...Kxc4!
    • 1.Rg4?
      • threat
        • 2.Rc3#
      • 1...dxc4
        • 2.Qh7#
      • 1...Kxc4!
    • 1.Rh4?
      • threat
        • 2.Rc3#
      • 1...dxc4
        • 2.Qh7#
      • 1...Kxc4!
    • 1.Re6?
      • threat
        • 2.Rc3#
      • 1...dxc4
        • 2.Re3#
      • 1...Kxc4!
    • 1.Re7?
      • threat
        • 2.Rc3#
      • 1...dxc4
        • 2.Re3#
      • 1...Kxc4!
    • 1.Re8?
      • threat
        • 2.Rc3#
      • 1...dxc4
        • 2.Re3#
      • 1...Kxc4!
    • 1.Qb8?
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qb1#
      • 1...dxc4
        • 2.Qb1#
      • 1...dxe4
        • 2.Qb3#
      • 1...f2!
  • Keys
    • 1.Qh3!
      • 1...Kxc4
        • 2.Qf1#
      • 1...Kxe4
        • 2.Qh7#
      • 1...dxc4
        • 2.Qxf3#
      • 1...dxe4
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XR(G)::QAB(H)
    • P(c);SBLOCK,XR(E)::R1(G)
    • P(c);SBLOCK,XR(G)::R1(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • R1(G)
      • Vars
        • P(c);SBLOCK,XR(G)::R1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(E);
      • Threat
        • R1(G)
      • Vars
        • P(c);SBLOCK,XR(G)::R1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(E);
      • Threat
        • R1(G)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(G)::QAB(H)
      • Refutation
        • P(c);XR(G)
    • Try
      • R(E);
      • Threat
        • R1(G)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(G)::QAB(H)
      • Refutation
        • P(c);XR(G)
    • Try
      • R(E);
      • Threat
        • R1(G)
      • Vars
        • P(c);SBLOCK,XR(G)::R1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(E);
      • Threat
        • R1(G)
      • Vars
        • P(c);SBLOCK,XR(G)::R1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(E);
      • Threat
        • R1(G)
      • Vars
        • P(c);SBLOCK,XR(G)::R1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(G)
    • Try
      • R(G);
      • Threat
        • R1(E)
      • Vars
        • P(c);SBLOCK,XR(E)::R1(G)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(G);
      • Threat
        • R1(E)
      • Vars
        • P(c);SBLOCK,XR(E)::QAB(H)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(G);
      • Threat
        • R1(E)
      • Vars
        • P(c);SBLOCK,XR(E)::QAB(H)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(G);
      • Threat
        • R1(E)
      • Vars
        • P(c);SBLOCK,XR(E)::QAB(H)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(G);
      • Threat
        • R1(E)
      • Vars
        • P(c);SBLOCK,XR(E)::R1(G)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(G);
      • Threat
        • R1(E)
      • Vars
        • P(c);SBLOCK,XR(E)::R1(G)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • R(G);
      • Threat
        • R1(E)
      • Vars
        • P(c);SBLOCK,XR(E)::R1(G)
      • Refutation
        • K(a);S_FLIGHT,XR(E)
    • Try
      • Q(H);
      • Vars
        • K(a);S_FLIGHT,XR(E)::QAB1(H)
        • K(a);S_FLIGHT,XR(G)::QAB(H)
        • P(c);SBLOCK,XR(E)::QAB(H)
        • P(c);SBLOCK,XR(G)::QAR2(H)
      • Refutation
        • P(b);
  • Actual
    • Q(H);P_PINP(b)
    • Vars
      • K(a);N_SPINP(b),S_FLIGHT,XR(E)::QAB(H)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XR(G)::QAB(H)
      • P(c);SBLOCK,XR(E)::QAR2(H),XP(b)
      • P(c);SBLOCK,XR(G)::QAB(H)
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