MESON Chess Problem Database

Problem Display
PID: 99818 (8/6N1/2p5/Q1PPp3/4kp2/3N4/1n3B2/1B5K w - - 0 1)

Lider, Valentin Viktorovich

Magyar Sakkelet, 1981

8/6N1/2p5/Q1PPp3/4kp2/3N4/1n3B2/1B5K

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sxb2+?
      • 1...Kxd5
        • 2.Qd2#
        • 2.Qd8#
        • 2.Qa2#
      • 1...Kf3!
    • 1.Qe1+?
      • 1...Kf3
        • 2.Sxe5#
      • 1...Kxd5!
    • 1.Qc3?
      • 1...Kxd5
        • 2.Sb4#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...cxd5
        • 2.Sxb2#
      • 1...Sd1
        • 2.Sb4#
      • 1...Sa4
        • 2.Sb4#
      • 1...Sc4
        • 2.Sb4#
      • 1...f3
        • 2.Qxe5#
      • 1...Kf3!
  • Keys
    • 1.Qd2!
      • 1...Kf3
        • 2.Sxe5#
      • 1...Kxd5
        • 2.Sxb2#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...cxd5
        • 2.Qe2#
      • 1...Sd1
        • 2.Se1#
      • 1...Sa4
        • 2.Se1#
      • 1...Sc4
        • 2.Se1#
      • 1...f3
        • 2.Sxb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK,XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::S(D),XP(d)
      • Refutation
        • K(b);S_FLIGHT,XP(G)
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT,XP(G)::S(D)
        • S(a);OGATE,P_SPINS(a),XS(D)::QAB1(E),XS(a)
        • P(e);SBLOCK,XP(G)::B(A)+S(D),XS(a)
        • S(a);N_GUARD::B(A)+S(D)
        • P(c);SBLOCK::QAR1(E),XP(d)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::S(D),XP(d)
      • K(b);S_FLIGHT,XP(G)::QAR(E)+S(D),XS(a)
      • S(a);OGATE,P_SPINS(a),XS(D)::QAB1(E),XS(a)
      • P(e);SBLOCK,XP(G)::QAR2(E)
      • S(a);N_GUARD::B(A)+S(D)
      • P(c);SBLOCK::B(A)+S(D),XS(a)
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