MESON Chess Problem Database

Problem Display
PID: 225406 (Kbn1b3/p2Bq3/1rn5/1N1k1Pp1/2R3N1/3pB3/8/2Q5 w - - 0 1)

Brabec, Juraj

1st HM., Praca, 1957

Kbn1b3/p2Bq3/1rn5/1N1k1Pp1/2R3N1/3pB3/8/2Q5

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Be6#
    • 1...Qb4
      • 2.Be6#
    • 1...Qc5
      • 2.Be6#
    • 1...Qd8
      • 2.Be6#
    • 1...Qf8
      • 2.Be6#
    • 1...Qe4
      • 2.Rc5#
    • 1...Qe6
      • 2.Bxe6#
    • 1...Qg7
      • 2.Be6#
    • 1...Qh7
      • 2.Be6#
    • 1...Sb4
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sa5
      • 2.Rd4#
    • 1...Se5
      • 2.Rd4#
    • 1...Sd8
      • 2.Rd4#
  • Tries
    • 1.Bxc6+?
      • 1...Rxc6
        • 2.Rd4#
      • 1...Bxc6+!
    • 1.Rc5+?
      • 1...Ke4
        • 2.Qh1#
      • 1...Qxc5!
    • 1.Qh1+?
      • 1...Qe4
        • 2.Be6#
        • 2.Rc5#
        • 2.Qxe4#
      • 1...Kxc4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qc4#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Qxe4
        • 2.Qc5#
      • 1...Rxb5
        • 2.Qxc6#
      • 1...Qb4
        • 2.Sf6#
      • 1...Qc5
        • 2.Sf6#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sa5
        • 2.Rd4#
      • 1...Se5
        • 2.Rd4#
      • 1...Sd6
        • 2.Sc3#

There are these versions: 93731

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD::B(G)
    • Q(g);N_GUARD,SBLOCK::R1(C)
    • Q(g);N_GUARD::B(G),XQ(g)
    • S(e);N_GUARD::R1(C)
    • S(e);N_GUARD::R1(C),XS(e)
  • Tries
    • Try
      • B(G);CHECK,XS(e)
      • Vars
        • R(d);XB(G)::R1(C)
      • Refutation
        • B(j);CHECK,XB(G)
    • Try
      • R(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • Q(g);XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(C)::QAB(A)
      • Q(g);N_GUARD,SBLOCK,XR(C)::QAR1(A)
      • R(d);N_GUARD,XS(E)::QAB1(A),XS(e)
      • Q(g);N_GUARD::S(D)
      • S(e);N_GUARD::R1(C),XS(e)
      • S(e);N_GUARD::R1(C)
      • S(i);SBLOCK::S(E)
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