MESON Chess Problem Database

Problem Display
PID: 163837 (8/2p3p1/3PB1p1/R5p1/pQ2pk2/2pp4/1Nb1PB1K/qrb5 w - - 0 1)

Biscan, Dragutin

Novi Temi, 1974

8/2p3p1/3PB1p1/R5p1/pQ2pk2/2pp4/1Nb1PB1K/qrb5

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Bg3#
    • 1...Bd1
      • 2.Sxd3#
    • 1...Bb3
      • 2.Sxd3#
    • 1...cxd6
      • 2.Qxd6#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Bg3#
      • 1...e3
        • 2.Sb2#
      • 1...dxe2!
    • 1.Qc5?
      • threat
        • 2.Bg3#
        • 2.Qe5#
        • 2.Qxg5#
      • 1...cxd6
        • 2.Bg3#
        • 2.Qxd6#
        • 2.Qxg5#
      • 1...e3
        • 2.Qb4#
        • 2.Qd4#
        • 2.Qc4#
        • 2.Qe5#
      • 1...g4
        • 2.Bg3#
        • 2.Qe5#
        • 2.Qg5#
      • 1...dxe2!
    • 1.Qd4?
      • threat
        • 2.Bg3#
        • 2.Qe5#
      • 1...cxd6
        • 2.Bg3#
        • 2.Qxd6#
      • 1...c5
        • 2.Bg3#
      • 1...dxe2!
    • 1.dxc7?
      • threat
        • 2.Qd6#
        • 2.Qf8#
      • 1...dxe2
        • 2.Qf8#
      • 1...Qa3!
    • 1.d7?
      • threat
        • 2.Qf8#
      • 1...c5
        • 2.Qb8#
      • 1...Qa3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qf8#
      • 1...e3
        • 2.Qb4#
      • 1...c5
        • 2.d7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(c);SBLOCK::B(C)
    • B(d);N_GUARD::S(A),XP(f)
    • P(l);OGATE,XP(G)::QAB(E),XP(l)
  • Tries
    • Try
      • S(A);N_PINP(h)
      • Threat
        • B(C)
      • Vars
        • P(h);::QAR(E)+S(A)
      • Refutation
        • P(f);XP(B)
    • Try
      • Q(E);N_PINP(h)
      • Threat
        • DUALS(3)
      • Refutation
        • P(f);XP(B)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(l);::B(C)
      • Refutation
        • P(f);XP(B)
    • Try
      • P(G);XP(l)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XP(B)::QAR(E)
      • Refutation
        • Q(a);
    • Try
      • P(G);
      • Threat
        • QAR(E)
      • Vars
        • P(l);OGATEB::QAB(E)
      • Refutation
        • Q(a);
  • Actual
    • Q(E);N_PINP(h)
    • Threat
      • QAR(E)
    • Vars
      • P(h);OGATEB::QAR(E)
      • P(l);::QAB(E)+P(G)
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