MESON Chess Problem Database

Problem Display
PID: 168245 (K4RB1/3Nk1p1/6p1/2PRr1r1/Q6N/1n3pn1/2b5/2B3q1 w - - 0 1)

Petite, Efren

3rd Comm., Die Schwalbe 124. TT, 1956-1957

K4RB1/3Nk1p1/6p1/2PRr1r1/Q6N/1n3pn1/2b5/2B3q1

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Bxg5#
    • 1...Re2
      • 2.Bxg5#
    • 1...Re4
      • 2.Bxg5#
    • 1...Rg4
      • 2.Rxe5#
    • 1...Rf5
      • 2.Sxg6#
    • 1...Bf5
      • 2.Bxg5#
    • 1...Sf5
      • 2.Rxe5#
  • Tries
    • 1.Rf7+?
      • 1...Ke6
        • 2.Rd6#
        • 2.Rxg7#
        • 2.Qc6#
      • 1...Ke8
        • 2.Sxe5#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sb8#
        • 2.Sf8#
      • 1...Kd8!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qf7#
      • 1...Ref5
        • 2.Qd6#
      • 1...Rgf5
        • 2.Sxg6#
      • 1...Bf5
        • 2.Qxg5#
      • 1...Sf5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD::B(A),XR(g)
    • R(g);N_GUARD::R(E),XR(f)
    • R(g);N_GUARD,S_CUTB(b)::S(C),XP(h)
    • B(b);S_CUTR(f)::B(A),XR(g)
    • S(e);S_CUTR(g)::R(E),XR(f)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • R(f);OGATE::QAB1(B)
      • R(g);N_GUARD,S_CUTB(b)::S(C),XP(h)
      • B(b);S_CUTR(f)::QAB(B),XR(g)
      • S(e);S_CUTR(g)::QAR2(B),XR(f)
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Developed and maintained by Brian Stephenson.
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