MESON Chess Problem Database

Problem Display
PID: 54610 (6K1/1N2Q2B/p1p1p3/4k1p1/Rn1N2r1/b2p2p1/q1pP1nb1/5RB1 w - - 0 1)

Sonnenfeld, Felix Alexander

Xadrez Brasileiro, 1943

6K1/1N2Q2B/p1p1p3/4k1p1/Rn1N2r1/b2p2p1/q1pP1nb1/5RB1

#2

9 + 14

5309 O Mosqueteiro do Rei 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qc5#
    • 1...Kf4
      • 2.Qf6#
    • 1...Kd5
      • 2.Qc5#
    • 1...Rxd4
      • 2.Qxg5#
    • 1...Sd1
      • 2.Qd6#
    • 1...Sh1
      • 2.Qd6#
    • 1...Sh3
      • 2.Qd6#
    • 1...Se4
      • 2.Rf5#
    • 1...Sd5
      • 2.Sxc6#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qc5#
      • 1...Kf4
        • 2.Qf6#
      • 1...Kd5
        • 2.Qc5#
      • 1...Rxd4
        • 2.Qxg5#
      • 1...Qd5
        • 2.Qf6#
      • 1...Bd5
        • 2.Qf6#
      • 1...Se4
        • 2.Rf5#
      • 1...Sd5
        • 2.Sxc6#
      • 1...Rf4+!
    • 1.Sf3+?
      • 1...Kf4
        • 2.Qf6#
        • 2.Qf8#
        • 2.Qf7#
      • 1...Kd5
        • 2.Qc5#
      • 1...Bxf3!
    • 1.Qg7+?
      • 1...Kf4
        • 2.Qf6#
      • 1...Kd5!
  • Keys
    • 1.Kg7!
      • threat
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qc5#
      • 1...Kf4
        • 2.Qf6#
      • 1...Kd5
        • 2.Qc5#
      • 1...Rxd4
        • 2.Qxg5#
      • 1...Qd5
        • 2.Qf6#
      • 1...Bd5
        • 2.Qf6#
      • 1...Se4
        • 2.Rf5#
      • 1...Sd5
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(j);N_SPINP(n),P_SPINS(c),S_FLIGHT,XS(E)::QAB1(G)
    • K(j);N_SPINP(n),P_SPINS(c),S_FLIGHT::QAR2(G)
    • K(j);N_SPINP(n),P-FLIGHT::QAR1(G)
    • R(i);N_GUARD,SBLOCK,XS(E)::QAR2(G),XP(k)
    • S(c);::QAB1(G)
    • S(c);OGATE,SBLOCK::R1(A)
    • S(h);N_GUARD,SBLOCK,S_CUTB(d)::S(E),XP(m)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Threat
        • QAB1(G)
      • Vars
        • K(j);N_SPINP(n),P_SPINS(c),S_FLIGHT,XS(E)::QAB1(G)
        • K(j);N_SPINP(n),P_SPINS(c),S_FLIGHT::QAR2(G)
        • K(j);N_SPINP(n),P-FLIGHT::QAR1(G)
        • R(i);N_GUARD,SBLOCK,XS(E)::QAR2(G),XP(k)
        • Q(a);SBLOCK::QAB1(G)
        • B(d);SBLOCK::QAB1(G)
        • S(c);OGATE,SBLOCK::R1(A)
        • S(h);N_GUARD,SBLOCK,S_CUTB(d)::S(E),XP(m)
      • Refutation
        • R(i);CHECK
    • Try
      • S(E);CHECK
      • Vars
        • K(j);N_SPINP(n),P-FLIGHT::QAR1(G)
      • Refutation
        • B(d);XS(E)
    • Try
      • Q(G);CHECK,N_PINP(n)
      • Vars
        • K(j);P_SPINS(c),S_FLIGHT::QAR2(G)
      • Refutation
        • K(j);P-FLIGHT
  • Actual
    • K(I);P-FLIGHT
    • Threat
      • QAB1(G)
    • Vars
      • K(j);N_SPINP(n),P_SPINS(c),S_FLIGHT,XS(E)::QAB1(G)
      • K(j);N_SPINP(n),P_SPINS(c),S_FLIGHT::QAR2(G)
      • K(j);N_SPINP(n),P-FLIGHT::QAR1(G)
      • R(i);N_GUARD,SBLOCK,XS(E)::QAR2(G),XP(k)
      • Q(a);SBLOCK::QAB1(G)
      • B(d);SBLOCK::QAB1(G)
      • S(c);OGATE,SBLOCK::R1(A)
      • S(h);N_GUARD,SBLOCK,S_CUTB(d)::S(E),XP(m)
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