MESON Chess Problem Database

Problem Display
PID: 107791 (B4BKb/5Rn1/R3N3/4kp2/3rprP1/3p4/4Q3/4N3 w - - 0 1)

Brabec, Juraj

UV CSTV, 1969

B4BKb/5Rn1/R3N3/4kp2/3rprP1/3p4/4Q3/4N3

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sxd3#
    • 1...Rb4
      • 2.Sxd3#
    • 1...Rc4
      • 2.Sxd3#
    • 1...Rf3
      • 2.Sxf3#
    • 1...Rxg4
      • 2.Sf3#
  • Tries
    • 1.Qh2?
      • threat
        • 2.Qxf4#
      • 1...Sxe6
        • 2.Rxf5#
      • 1...Sh5
        • 2.Rxf5#
      • 1...e3
        • 2.Sf3#
      • 1...Rd6!
    • 1.Qxe4+?
      • 1...Rdxe4
        • 2.Sxd3#
      • 1...Rfxe4
        • 2.Sf3#
      • 1...fxe4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qxd4#
      • 1...Sxe6
        • 2.Bd6#
      • 1...e3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::S(A),XP(a)
    • R(d);N_GUARD::S(A),XR(d)
    • R(d);N_GUARD,XP(C)::S(A)
  • Tries
    • Try
      • Q(B);N_PINP(c),P_PINR(d)
      • Threat
        • QAB1(B),XR(d)
      • Vars
        • S(g);N_GUARD,XS(E)::R1(F),XP(f)
        • S(g);N_GUARD::R1(F),XP(f)
        • P(c);N_GUARD::S(A)
      • Refutation
        • R(b);
    • Try
      • Q(B);CHECK,XP(c)
      • Vars
        • R(b);XQ(B)::S(A),XP(a)
        • R(d);XQ(B)::S(A)
      • Refutation
        • P(f);XQ(B)
  • Actual
    • Q(B);N_PINP(c),P_PINR(b)
    • Threat
      • QAB1(B),XR(b)
    • Vars
      • S(g);SBLOCK,XS(E)::B(H)
      • P(c);N_GUARD::S(A),XP(a)
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