MESON Chess Problem Database

Problem Display
PID: 168293 (5R1K/8/B6p/5Npq/2PPk3/2P1N1Pn/2P3P1/1r3R2 w - - 0 1)

Petite, Efren

Praca, 1995

5R1K/8/B6p/5Npq/2PPk3/2P1N1Pn/2P3P1/1r3R2

#2

12 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Re8#
    • 1...Qe2
      • 2.Re8#
    • 1...Qf3
      • 2.Re8#
      • 2.gxf3#
    • 1...Qg4
      • 2.Re8#
    • 1...Qe8
      • 2.Rxe8#
    • 1...Qh4
      • 2.Re8#
    • 1...Ra1
      • 2.Bb7#
    • 1...Rc1
      • 2.Bb7#
    • 1...Rd1
      • 2.Bb7#
    • 1...Re1
      • 2.Bb7#
    • 1...Rxf1
      • 2.Bb7#
    • 1...Rb7
      • 2.Bxb7#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Sd6#
      • 1...Qxd1
        • 2.Re8#
      • 1...Rxd1
        • 2.Bb7#
      • 1...Qg6
        • 2.Re1#
      • 1...Rb6!
    • 1.Sg4?
      • threat
        • 2.Sf6#
        • 2.Sd6#
      • 1...Qxg4
        • 2.Re8#
      • 1...Rxf1
        • 2.Sd6#
        • 2.Bb7#
      • 1...Qf7
        • 2.Sd6#
      • 1...Rb6
        • 2.Re1#
      • 1...Sf2
        • 2.Sxf2#
        • 2.Sd6#
      • 1...Sf4
        • 2.Sf2#
        • 2.Sd6#
      • 1...Qg6!
  • Keys
    • 1.Re1!
      • threat
        • 2.Sd6#
      • 1...Rxe1
        • 2.Bb7#
      • 1...Qg6
        • 2.Sd1#
      • 1...Qe2
        • 2.Re8#
      • 1...Rb6
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(e);N_GUARD::R(K)
    • Q(e);N_GUARD,P_PINR(K)::R(K),XQ(e)
    • R(a);N_GUARD::B(J)
    • R(a);N_GUARD,XR(A)::B(J)
    • R(a);N_GUARD::B(J),XR(a)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(I)
      • Vars
        • Q(e);N_GUARD,XS(E)::R(K)
        • R(a);N_GUARD,XS(E)::B(J)
        • Q(e);N_GUARD::R(A)
      • Refutation
        • R(a);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);N_GUARD,XS(E)::R(K)
        • Q(e);::S(I)
        • R(a);N_GUARD::R(A)
      • Refutation
        • Q(e);
  • Actual
    • R(A);
    • Threat
      • S(I)
    • Vars
      • R(a);N_GUARD,XR(A)::B(J)
      • Q(e);N_GUARD::R(A)+S(E)
      • Q(e);N_GUARD::R(K)
      • R(a);N_GUARD::R(A)+S(E)
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