MESON Chess Problem Database

Problem Display
PID: 54617 (8/3N4/pqp4K/Qbr4p/p3R3/N1pk4/1n2R3/Br6 w - - 0 1)

Sonnenfeld, Felix Alexander

Boletim da UBP, 1980

8/3N4/pqp4K/Qbr4p/p3R3/N1pk4/1n2R3/Br6

#2

7 + 11

5309 O Mosqueteiro do Rei 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Sxc5#
    • 1...Qc7
      • 2.Sxc5#
    • 1...Qd8
      • 2.Sxc5#
    • 1...Qb7
      • 2.Sxc5#
    • 1...Qb8
      • 2.Sxc5#
    • 1...Rc4
      • 2.Se5#
    • 1...Re5
      • 2.Sxe5#
    • 1...Sc4
      • 2.Qxc3#
    • 1...c2
      • 2.R2e3#
      • 2.Qd2#
  • Tries
    • 1.Qxc3+?
      • 1...Rxc3
        • 2.Se5#
      • 1...Kxc3!
    • 1.Qxb6?
      • threat
        • 2.Sxc5#
      • 1...Rc4
        • 2.Se5#
        • 2.R4e3#
        • 2.Qe3#
      • 1...Rd5
        • 2.R4e3#
        • 2.Qe3#
      • 1...Re5
        • 2.Sxe5#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Rf5
        • 2.R4e3#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Rg5
        • 2.R4e3#
        • 2.Qe3#
        • 2.Qd4#
      • 1...c2!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sb4#
      • 1...Qxa5
        • 2.Sxc5#
      • 1...Rc4
        • 2.Se5#
      • 1...Bc4
        • 2.R4e3#
      • 1...Sd1
        • 2.Se1#
      • 1...Sc4
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(j);N_GUARD,XQ(E)::S(G),XR(g)
    • Q(j);N_GUARD::S(G),XR(g)
    • R(g);N_GUARD::S(G)
    • R(g);N_GUARD::S(G),XR(g)
    • S(b);S_CUTR(g)::QAR1(E),XP(c)
  • Tries
    • Try
      • Q(E);CHECK,XP(c)
      • Vars
        • R(g);SBLOCK,XQ(E)::S(G)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b),XQ(E)
    • Try
      • Q(E);XQ(j)
      • Threat
        • S(G),XR(g)
      • Refutation
        • P(c);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(j);N_GUARD,XQ(E)::S(G),XR(g)
      • R(g);N_GUARD::S(G)
      • B(f);SBLOCK::R1(D)
      • S(b);S_CUTR(a)::S(C)
      • S(b);S_CUTR(g)::QAR1(E),XP(c)
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