MESON Chess Problem Database

Problem Display
PID: 261321 (2b1R3/4Rp2/1PPk1n2/N5B1/1P1P1PBq/4N1pn/8/2K5 w - - 0 1)

Benedek, Attila

Neue Zurcher Zeitung, 1986

2b1R3/4Rp2/1PPk1n2/N5B1/1P1P1PBq/4N1pn/8/2K5

#2

12 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf4
      • 2.Bxf4#
    • 1...Sd5
      • 2.Sec4#
  • Tries
    • 1.Sf5+?
      • 1...Kd5
        • 2.Re5#
      • 1...Bxf5!
    • 1.Bf3?
      • threat
        • 2.Sec4#
        • 2.Sac4#
      • 1...Qxf4
        • 2.Sc4#
      • 1...Ba6
        • 2.Sf5#
      • 1...Be6
        • 2.Sb7#
      • 1...Sd5
        • 2.Sec4#
      • 1...Se4!
    • 1.Re5?
      • threat
        • 2.Sec4#
      • 1...Ba6
        • 2.Sf5#
      • 1...Be6!
    • 1.Rc7?
      • threat
        • 2.Sac4#
      • 1...Be6
        • 2.Sb7#
      • 1...Ba6!
    • 1.d5?
      • threat
        • 2.Sac4#
      • 1...Sxd5
        • 2.Sec4#
      • 1...Ba6!
  • Keys
    • 1.b5!
      • threat
        • 2.Sac4#
      • 1...Be6
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(b);OGATE,XP(E)::B(H),XS(b)
    • S(e);SBLOCK::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT,S_CUTB(g)::R1(K)
      • Refutation
        • B(g);XS(B)
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);P_PINS(B),XP(E)::S(G)
        • B(g);N_GUARD::S(B)
        • B(g);N_GUARD::S(G)
        • S(e);::S(B)
      • Refutation
        • S(e);
    • Try
      • R(K);
      • Threat
        • S(B)
      • Vars
        • B(g);N_GUARD::S(B)
      • Refutation
        • B(g);
    • Try
      • R(K);
      • Threat
        • S(G)
      • Vars
        • B(g);N_GUARD::S(G)
      • Refutation
        • B(g);
    • Try
      • P(D);
      • Threat
        • S(G)
      • Vars
        • S(e);SBLOCK,XP(D)::S(B)
      • Refutation
        • B(g);
  • Actual
    • P(C);
    • Threat
      • S(G)
    • Vars
      • B(g);N_GUARD::S(G)
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