MESON Chess Problem Database

Problem Display
PID: 173638 (b4BK1/2pp1R2/3N4/1Q1qk1P1/8/7B/2nR2P1/2N5 w - - 0 1)

Boros, Sandor

Swiat Szachowy, 1993

b4BK1/2pp1R2/3N4/1Q1qk1P1/8/7B/2nR2P1/2N5

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Bg7#
    • 1...Qc5
      • 2.Bg7#
    • 1...Sd4
      • 2.Sd3#
  • Tries
    • 1.Qe2+?
      • 1...Qe4
        • 2.Sc4#
        • 2.Bg7#
      • 1...Se3!
    • 1.Qb2+?
      • 1...Sd4
        • 2.Sd3#
      • 1...Qd4!
    • 1.Qc5?
      • threat
        • 2.Sd3#
        • 2.Bg7#
      • 1...Qxc5
        • 2.Bg7#
      • 1...Se1
        • 2.Bg7#
        • 2.Re2#
      • 1...Sb4
        • 2.Bg7#
        • 2.Re2#
      • 1...cxd6!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qf4#
      • 1...Qxf7+
        • 2.Sxf7#
      • 1...Qxc4
        • 2.Bg7#
      • 1...Qxd2
        • 2.Rf5#
      • 1...Qf3
        • 2.Re7#
      • 1...Qe4
        • 2.Bg7#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Qd4
        • 2.Rf5#
      • 1...Sd4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_PINR(H),N_SPINQ(b),XQ(E)::B(I)
    • Q(b);N_PINR(H)::B(I)
    • S(a);SBLOCK::S(A)
  • Tries
    • Try
      • Q(E);CHECK,N_PINQ(b)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(E);CHECK,N_PINQ(b)
      • Vars
        • S(a);P_SPINS(a)::S(A)
      • Refutation
        • Q(b);N_PINR(H),P_SPINQ(b)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_PINR(H),N_SPINQ(b),XQ(E)::B(I)
      • Refutation
        • P(d);XS(G)
  • Actual
    • Q(E);N_PINQ(b)
    • Threat
      • QAB1(E)
    • Vars
      • Q(b);CHECK,XR(H)::S(G),XQ(b)
      • Q(b);XQ(E)::B(I)
      • Q(b);N_PINR(H),XR(B)::R1(H)
      • Q(b);N_PINR(H)::R(H)
      • Q(b);N_PINR(H)::B(I)
      • Q(b);N_GUARD,N_PINR(H)::S(A),XQ(b)
      • Q(b);N_PINR(H)::R1(H)
      • S(a);S_CUTQ(b)::S(A)
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