MESON Chess Problem Database

Problem Display
PID: 54613 (8/3R1p2/Br1n1B1p/r1Q1pPpK/q2N4/1pP1kP1N/1R2P3/8 w - - 0 1)

Sonnenfeld, Felix Alexander

HM., Boletim da UBP, 1965-1966

8/3R1p2/Br1n1B1p/r1Q1pPpK/q2N4/1pP1kP1N/1R2P3/8

#2

12 + 10

5309 O Mosqueteiro do Rei 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qxd7
      • 2.Sb5#
    • 1...Qa1
      • 2.Sb5#
    • 1...Qa2
      • 2.Sb5#
    • 1...Sc4
      • 2.Sb5#
    • 1...Se4
      • 2.Sc2#
    • 1...Sb5
      • 2.Qxe5#
    • 1...Sxf5
      • 2.Sc2#
      • 2.Sxf5#
    • 1...Sb7
      • 2.Sc2#
    • 1...Sc8
      • 2.Sc2#
    • 1...Se8
      • 2.Sc2#
  • Tries
    • 1.Qxe5+?
      • 1...Se4
        • 2.Qxe4#
      • 1...Rxe5!
  • Keys
    • 1.Kxh6!
      • threat
        • 2.Bxg5#
      • 1...Sxf5+
        • 2.Sxf5#
      • 1...Sc4
        • 2.Sb5#
      • 1...Se4
        • 2.Sc2#
      • 1...Sb5
        • 2.Qxe5#
      • 1...Sb7
        • 2.Sc2#
      • 1...Sc8
        • 2.Sc2#
      • 1...Se8
        • 2.Sc2#
      • 1...g4
        • 2.Bg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::QAB(G)+S(F),XQ(c)
    • Q(c);N_GUARD,XR(L)::QAB(G)+S(F)
    • Q(c);N_GUARD::QAB(G)+S(F)
    • S(h);S_CUTQ(c)::QAB(G)+S(F)
    • S(h);::QAB(G)+S(F),DCHECK
    • S(h);N_GUARD,S_CUTR(d)::QAR2(G),XP(e)
  • Tries
    • Try
      • Q(G);CHECK,XP(e)
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAR1(G),XS(h)
      • Refutation
        • R(d);XQ(G)
  • Actual
    • K(I);P-FLIGHT,XP(i)
    • Threat
      • B(K),XP(f)
    • Vars
      • S(h);CHECK,P_PINB(K),XP(H)::QAB(G)+S(F),DCHECK,XS(h)
      • S(h);P_PINB(K),S_CUTQ(c)::QAB(G)+S(F)
      • S(h);P_PINB(K)::QAB(G)+S(F),DCHECK
      • S(h);N_GUARD,P_PINB(K),S_CUTR(d)::QAR2(G),XP(e)
      • P(f);::B(K)
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