MESON Chess Problem Database

Problem Display
PID: 106605 (5Q2/5Pp1/bn4Kp/1n1Pk3/1P6/1P1Rb2p/6B1/4N3 w - - 0 1)

Schuld, Henk L

Illustracyja Polska, 1903

5Q2/5Pp1/bn4Kp/1n1Pk3/1P6/1P1Rb2p/6B1/4N3

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Qe7#
    • 1...Sa3
      • 2.Qb8#
    • 1...Sc3
      • 2.Qb8#
    • 1...Sd4
      • 2.Qb8#
    • 1...Sa7
      • 2.Qb8#
  • Tries
    • 1.Rxe3+?
      • 1...Kd4
        • 2.Sc2#
        • 2.Qc5#
      • 1...Kf4!
    • 1.Qxg7+?
      • 1...Kd6
        • 2.f8Q#
        • 2.f8B#
      • 1...Kf4!
    • 1.Qb8+?
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sd6!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Sf3#
      • 1...Kxd4
        • 2.Qxg7#
      • 1...Bxd4
        • 2.Sd3#
      • 1...Sxd4
        • 2.Qb8#
      • 1...Sxd5
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);SBLOCK::QAR2(I)
    • S(c);N_GUARD::QAB(I)
  • Tries
    • Try
      • R(D);CHECK,XB(a)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(I);CHECK,XP(h)
      • Vars
        • K(d);S_FLIGHT::P=Q
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(I),XS(c)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • R(D);
    • Threat
      • S(A)
    • Vars
      • K(d);S_FLIGHT,XR(D)::QAB(I),XP(h)
      • B(a);SBLOCK,XR(D)::S(A)
      • S(c);N_GUARD,SBLOCK,XR(D)::QAB(I)
      • S(f);SBLOCK,XP(F)::R1(D)
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