MESON Chess Problem Database

Problem Display
PID: 107804 (8/3N2B1/R2PpP1R/pB1kpP2/p7/1n3P2/rnN5/6QK w - - 0 1)

Brabec, Juraj

Lehen, Ludovit

Sachove umeni (Ceskoslovensky sach), 1983

8/3N2B1/R2PpP1R/pB1kpP2/p7/1n3P2/rnN5/6QK

#2

12 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qc5#
    • 1...Sc1
      • 2.Qc5#
    • 1...Sd2
      • 2.Qc5#
    • 1...Sd4
      • 2.Se3#
    • 1...Sc5
      • 2.Qxc5#
  • Tries
    • 1.Bf8?
      • threat
        • 2.Sb6#
      • 1...exf5
        • 2.Qg8#
      • 1...Sc4
        • 2.Bc6#
      • 1...Sd4
        • 2.Se3#
      • 1...e4!
    • 1.Rh4?
      • threat
        • 2.Se3#
      • 1...Sd1
        • 2.Bc4#
      • 1...Sc4
        • 2.Bxc4#
      • 1...e4
        • 2.fxe4#
      • 1...exf5!
    • 1.Qe3?
      • threat
        • 2.Qe4#
        • 2.Qxe5#
      • 1...exf5
        • 2.Qxe5#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sc4
        • 2.Qe4#
      • 1...Sd2
        • 2.Qc5#
        • 2.Qxe5#
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qxe5#
      • 1...e4
        • 2.Qxe4#
        • 2.fxe4#
      • 1...Ra1+!
    • 1.Qd4+?
      • 1...Sxd4
        • 2.Se3#
      • 1...exd4!
    • 1.Qe1?
      • threat
        • 2.Qe4#
        • 2.Qxe5#
      • 1...exf5
        • 2.Qxe5#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sc4
        • 2.Qe4#
      • 1...Sd2
        • 2.Qxe5#
      • 1...Sc5
        • 2.Qxe5#
      • 1...e4
        • 2.Qxe4#
        • 2.fxe4#
      • 1...Ra1!
  • Keys
    • 1.f7!
      • threat
        • 2.Sf6#
      • 1...exf5
        • 2.Sb6#
      • 1...Sd4
        • 2.Se3#
      • 1...e4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::QAR1(A)
    • S(c);SBLOCK::S(C)
    • S(c);N_GUARD::QAR1(A),XS(c)
  • Tries
    • Try
      • B(L);
      • Threat
        • S(K)
      • Vars
        • P(h);OGATEB,XP(F)::QAB(A)
        • S(b);SBLOCK::B(E)
        • S(c);SBLOCK::S(C)
      • Refutation
        • P(g);
    • Try
      • R(J);
      • Threat
        • S(C)
      • Vars
        • S(b);N_GUARD::B(E)
        • S(b);N_GUARD::B(E),XS(b)
        • P(g);OGATE::P(D),XP(g)
      • Refutation
        • P(h);XP(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XP(F)::QAR1(A),XP(g)
        • S(b);::QAB1(A)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);SBLOCK,XQ(A)::S(C)
      • Refutation
        • P(g);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);XP(F)::QAR1(A),XP(g)
        • S(b);::QAB1(A)
        • S(c);::QAR1(A),XP(g)
      • Refutation
        • R(a);P_PINQ(A)
  • Actual
    • P(I);
    • Threat
      • S(K)
    • Vars
      • P(h);XP(F)::S(K)
      • S(c);SBLOCK::S(C)
      • P(g);::S(C)
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