MESON Chess Problem Database

Problem Display
PID: 176266 (5Q1n/2r2p2/2P2kp1/2p3N1/3nP2P/5N2/1R6/B1K5 w - - 0 1)

Laib, Kurt Friedrich

Schach-Echo, 1972

5Q1n/2r2p2/2P2kp1/2p3N1/3nP2P/5N2/1R6/B1K5

#2

9 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Qxh8#
    • 1...Sc2
      • 2.Rxc2#
    • 1...Se2+
      • 2.Rxe2#
    • 1...Sb3+
      • 2.Rxb3#
    • 1...Sxf3
      • 2.Rf2#
    • 1...Sb5
      • 2.Rxb5#
    • 1...Sf5
      • 2.e5#
    • 1...Sxc6
      • 2.Rb6#
    • 1...Se6
      • 2.Sh7#
  • Tries
    • 1.Sh2?
      • threat
        • 2.Sg4#
      • 1...Se2+
        • 2.Rxe2#
      • 1...Sb3+
        • 2.Rxb3#
      • 1...Ke5!
    • 1.Qd6+?
      • 1...Se6
        • 2.Rb1#
        • 2.Ra2#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rb7#
        • 2.Rb8#
      • 1...Kg7!
    • 1.Qd8+?
      • 1...Re7
        • 2.Qxh8#
      • 1...Kg7!
  • Keys
    • 1.Rb6!
      • 1...Rxc6
        • 2.Rxc6#
      • 1...Ra7
        • 2.c7#
      • 1...Rb7
        • 2.cxb7#
      • 1...Rd7
        • 2.cxd7#
      • 1...Re7
        • 2.Qxh8#
      • 1...Rc8
        • 2.c7#
      • 1...c4
        • 2.Bxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • R(e);SBLOCK::QAB(I),XS(g)
    • S(a);OGATEB::B(A)+R(C),XS(a)
    • S(a);CHECK,OGATEB::B(A)+R(C),XS(a)
    • S(a);OGATEB,XS(D)::B(A)+R(C)
    • S(a);SBLOCK::P(E)
    • S(a);OGATEB,XP(H)::B(A)+R(C)
    • S(a);SBLOCK::S(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • S(a);CHECK,OGATEB::B(A)+R(C),XS(a)
      • Refutation
        • K(c);N_SPINP(f),S_FLIGHT
    • Try
      • Q(I);CHECK,N_PINP(f)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(I);CHECK,N_PINP(f)
      • Vars
        • R(e);P_SPINR(e),SBLOCK::QAB(I),XS(g)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(C);P_PINS(a)
    • Vars
      • R(e);OGATE,P_SPINR(e),XP(H)::R(C),XR(e)
      • R(e);OGATE::R(C)+P(H)
      • R(e);OGATE::R(C)+P(H),XR(e)
      • R(e);SBLOCK::QAB(I),XS(g)
      • P(b);N_GUARD::B(A),XS(a)
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