MESON Chess Problem Database

Problem Display
PID: 165217 (8/8/7n/r1p5/3k1K2/Q1NrN3/3p4/3b4 w - - 0 1)

Libis, Zdenek

Sachova skladba, 2007

8/8/7n/r1p5/3k1K2/Q1NrN3/3p4/3b4

#2

4 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Sb5#
    • 1...Ra4
      • 2.Sb5#
    • 1...Rb5
      • 2.Sxb5#
    • 1...Ra6
      • 2.Sb5#
    • 1...Ra7
      • 2.Sb5#
    • 1...Ra8
      • 2.Sb5#
    • 1...Bc2
      • 2.Se2#
    • 1...Be2
      • 2.Sxe2#
    • 1...Bb3
      • 2.Se2#
    • 1...Ba4
      • 2.Se2#
  • Tries
    • 1.Qb4+?
      • 1...c4
        • 2.Qxc4#
      • 1...cxb4!
    • 1.Qb3?
      • threat
        • 2.Qc4#
      • 1...Rxc3
        • 2.Qd5#
      • 1...Bxb3
        • 2.Se2#
      • 1...c4
        • 2.Qxc4#
      • 1...Ra4
        • 2.Sb5#
      • 1...Rxe3!
    • 1.Qxa5?
      • threat
        • 2.Sb5#
      • 1...Rxc3
        • 2.Qd8#
      • 1...Ba4
        • 2.Se2#
      • 1...c4
        • 2.Qe5#
      • 1...Rxe3!
  • Keys
    • 1.Qa4+!
      • 1...Kxc3
        • 2.Sxd1#
      • 1...Rxa4
        • 2.Sb5#
      • 1...Bxa4
        • 2.Se2#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(e);N_GUARD,XQ(A)::S(B)
    • R(e);N_GUARD::S(B)
    • R(e);N_GUARD::S(B),XR(e)
    • B(a);N_GUARD::S(B)
    • B(a);N_GUARD::S(B),XB(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAR1(A),XP(f)
      • Refutation
        • P(f);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(c);SBLOCK,XS(B)::QAR1(A)
        • B(a);N_GUARD,XQ(A)::S(B)
        • P(f);::QAR1(A),XP(f)
        • R(e);N_GUARD::S(B)
      • Refutation
        • R(c);XS(C)
    • Try
      • Q(A);XR(e)
      • Threat
        • S(B)
      • Vars
        • R(c);SBLOCK,XS(B)::QAR(A)
        • B(a);N_GUARD::S(B)
        • P(f);OGATE::QAB1(A)
      • Refutation
        • R(c);XS(C)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(d);S_FLIGHT,XS(B)::S(C),XB(a)
      • R(e);XQ(A)::S(B)
      • B(a);XQ(A)::S(B)
      • P(f);P_SPINP(f)::QAR1(A),XP(f)
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