MESON Chess Problem Database

Problem Display
PID: 52587 (6B1/8/8/2p2pN1/2N2b1R/3k2n1/1Q4K1/8 w - - 0 1)

Sonnenfeld, Felix Alexander

Themes-64, 1975

6B1/8/8/2p2pN1/2N2b1R/3k2n1/1Q4K1/8

#2

6 + 5

5309 O Mosqueteiro do Rei 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qxd2#
    • 1...Be3
      • 2.Se5#
    • 1...Be5
      • 2.Qd2#
    • 1...Bd6
      • 2.Qd2#
    • 1...Bc7
      • 2.Qd2#
    • 1...Bb8
      • 2.Qd2#
  • Tries
    • 1.Se5+?
      • 1...Ke3
        • 2.Qf2#
      • 1...Bxe5!
    • 1.Sh3?
      • threat
        • 2.Sf2#
      • 1...Ke4
        • 2.Sf2#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Be3
        • 2.Se5#
      • 1...Se4
        • 2.Sxf4#
      • 1...Sh1!
    • 1.Rxf4?
      • threat
        • 2.Rf3#
        • 2.Qd2#
      • 1...Se4
        • 2.Rf3#
      • 1...Sf1!
    • 1.Qc2+?
      • 1...Kd4
        • 2.Sf3#
        • 2.Qd2#
      • 1...Kxc2!
    • 1.Qb3+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Ke2!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sxc5#
      • 1...Kxc4
        • 2.Sxf4#
      • 1...Ke4
        • 2.Sxc5#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Be3
        • 2.Se5#
      • 1...Bd6
        • 2.Qd2#
      • 1...Se4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD::QAR1(A),XB(c)
    • B(c);N_GUARD,SBLOCK::S(C)
    • B(c);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • B(c);XS(C)
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(a);P_SPINB(c),S_FLIGHT::S(E)
        • B(c);N_GUARD::QAR1(A),XB(c)
        • B(c);N_GUARD,SBLOCK::S(C)
        • S(b);SBLOCK::S(E),XB(c)
      • Refutation
        • S(b);
    • Try
      • R(D);XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::R(D)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT,P_SPINB(c)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(E);
    • Threat
      • S(E),XP(d)
    • Vars
      • K(a);P_SPINB(c),S_FLIGHT,XS(C)::B(F)+S(E),XB(c)
      • K(a);P_SPINB(c),S_FLIGHT::S(E),XP(d)
      • B(c);N_GUARD::QAR1(A),XB(c)
      • B(c);N_GUARD,SBLOCK::S(C)
      • B(c);N_GUARD::QAR1(A)
      • S(b);SBLOCK::S(E),XB(c)
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