MESON Chess Problem Database

Problem Display
PID: 92086 (5NK1/2r1pQ1p/2pN4/4k3/1P1nP2B/2PP2P1/q7/4R3 w - - 0 1)

Wielgos, Oskar

Schach, 1976

5NK1/2r1pQ1p/2pN4/4k3/1P1nP2B/2PP2P1/q7/4R3

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.e5#
    • 1...Qb1
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qxf7+
      • 2.Sxf7#
    • 1...Qa1
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qb2
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qc2
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qd2
      • 2.Sc4#
    • 1...Qe2
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qf2
      • 2.Sc4#
    • 1...Qg2
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qh2
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qa3
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qa4
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qa5
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qa6
      • 2.Qf4#
    • 1...Qa7
      • 2.Sc4#
      • 2.Qf4#
    • 1...Qa8
      • 2.Sc4#
      • 2.Qf4#
    • 1...Sb3
      • 2.Sc4#
      • 2.Qe6#
      • 2.Qf4#
    • 1...exd6
      • 2.Bf6#
    • 1...e6
      • 2.Qf4#
  • Tries
    • 1.Bf6+?
      • 1...Kxd6
        • 2.e5#
      • 1...exf6!
    • 1.Qxa2?
      • threat
        • 2.Sc4#
        • 2.Sf7#
      • 1...Kxd6
        • 2.e5#
      • 1...e6
        • 2.Sc4#
      • 1...exd6!
    • 1.Qd5+?
      • 1...cxd5
        • 2.Sf7#
      • 1...Qxd5+!
    • 1.Qe6+?
      • 1...Sxe6
        • 2.Sf7#
      • 1...Qxe6+!
    • 1.cxd4+?
      • 1...Kxd6
        • 2.e5#
      • 1...Kxd4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sf7#
      • 1...Qxc4+
        • 2.Sxc4#
      • 1...Kxd6
        • 2.e5#
      • 1...exd6
        • 2.cxd4#
      • 1...Qf2
        • 2.Qc5#
      • 1...e6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • K(c);OGATE,S_FLIGHT,XS(H)::P(F)
    • Q(a);N_GUARD::S(H),XQ(a)
    • Q(a);CHECK,XQ(I)::S(H),XQ(a)
    • Q(a);N_GUARD,N_PINQ(I)::S(H)
    • Q(a);N_PINQ(I)::QAB1(I)
    • P(f);N_GUARD,SBLOCK,XS(H)::B(G)
    • P(f);N_PINQ(I)::QAB1(I)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XS(H)::P(F)
      • Refutation
        • P(f);XB(G)
    • Try
      • Q(I);N_SPINQ(I),XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);OGATE,S_FLIGHT,XS(H)::P(F)
        • P(f);::S(H)
      • Refutation
        • P(f);XS(H)
    • Try
      • Q(I);CHECK
      • Vars
        • P(d);XQ(I)::S(H)
      • Refutation
        • Q(a);CHECK,XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • S(b);XQ(I)::S(H)
      • Refutation
        • Q(a);CHECK,XQ(I)
    • Try
      • P(B);CHECK,XS(b)
      • Vars
        • K(c);OGATE,S_FLIGHT,XS(H)::P(F)
      • Refutation
        • K(c);S_FLIGHT,XP(B)
  • Actual
    • Q(I);
    • Threat
      • S(H)
    • Vars
      • Q(a);CHECK,XQ(I)::S(H),XQ(a)
      • K(c);OGATE,S_FLIGHT,XS(H)::P(F)
      • P(f);SBLOCK,XS(H)::P(B),XS(b)
      • Q(a);N_PINQ(I)::QAR2(I)
      • P(f);N_PINQ(I)::QAB1(I),XS(b)
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