MESON Chess Problem Database

Problem Display
PID: 42252 (B3b3/2B2p2/r2p4/Npk1bRnp/P1pN2rq/8/1R1Q4/K2n4 w - - 0 1)

Pribyl, Vaclav

1/3 Prize, Sachove umeni (Ceskoslovensky sach), 1955/II

B3b3/2B2p2/r2p4/Npk1bRnp/P1pN2rq/8/1R1Q4/K2n4

#2

9 + 13

3335 Cyclone 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qb4#
    • 1...Rc6
      • 2.Rxb5#
    • 1...d5
      • 2.Sb7#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Qb4#
        • 2.Qd5#
      • 1...Rxa8
        • 2.Qxd6#
      • 1...Qe1
        • 2.Qd5#
      • 1...Qh1
        • 2.Qb4#
      • 1...Rd4
        • 2.Qb4#
      • 1...Rc6
        • 2.Sb7#
      • 1...Bc6
        • 2.Qxd6#
      • 1...Se3
        • 2.Qb4#
      • 1...c3
        • 2.Qd5#
      • 1...b4
        • 2.Qxb4#
        • 2.Qd5#
      • 1...d5
        • 2.Qb4#
        • 2.Qxd5#
      • 1...Sc3!
    • 1.Se6+?
      • 1...Sxe6
        • 2.Qd5#
      • 1...fxe6!
    • 1.Rxe5+?
      • 1...d5
        • 2.Sb7#
        • 2.Rxd5#
      • 1...dxe5!
  • Keys
    • 1.Sdc6!
      • threat
        • 2.Qxd6#
      • 1...Rxc6
        • 2.Sb7#
      • 1...Rd4
        • 2.Rxb5#
      • 1...Se4
        • 2.Qd4#
      • 1...d5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XS(E)::QAB1(C)
    • R(j);S_CUTB(m)::R1(B),XP(e)
    • P(k);N_SPINB(g),SBLOCK::S(F)
  • Tries
    • Try
      • S(E);P_SPINR(B)
      • Threat
        • DUALS(2)
      • Vars
        • R(j);N_GUARD,XB(I)::QAB1(C),XP(k)
        • Q(d);::QAR1(C)
        • Q(d);::QAB1(C)
        • R(c);N_PINR(B)::QAB1(C)
        • R(j);SBLOCK::S(F)
        • B(m);S_CUTR(j)::QAB1(C),XP(k)
        • S(a);::QAB1(C)
        • P(b);N_PINR(B)::QAR1(C)
      • Refutation
        • S(a);N_PINR(B)
    • Try
      • S(E);CHECK,P_SPINR(B)
      • Vars
        • S(h);XS(E)::QAR1(C)
      • Refutation
        • P(l);XS(E)
    • Try
      • R(G);CHECK,XB(g)
      • Refutation
        • P(k);XR(G)
  • Actual
    • S(E);P_SPINR(B)
    • Threat
      • QAB1(C),XP(k)
    • Vars
      • R(j);SBLOCK,XS(E)::S(F)
      • R(c);N_PINR(B)::R1(B),XP(e)
      • S(h);S_CUTR(c)::QAB1(C)
      • P(k);N_SPINB(g),SBLOCK::QAB1(C)
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