MESON Chess Problem Database

Problem Display
PID: 102677 (BB6/4Np2/2q5/2N2b1R/pQpkpRn1/K3p3/4P3/8 w - - 0 1)

Michel, Francois

Monreal, Pierre

Europe Echecs, 1965

BB6/4Np2/2q5/2N2b1R/pQpkpRn1/K3p3/4P3/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sxf5#
    • 1...Qe8
      • 2.Sxf5#
    • 1...Qa6
      • 2.Sxf5#
    • 1...Qb6
      • 2.Sxf5#
    • 1...Qh6
      • 2.Sxf5#
    • 1...Be6
      • 2.Sxc6#
    • 1...Bg6
      • 2.Sxc6#
    • 1...Bh7
      • 2.Sxc6#
    • 1...Bc8
      • 2.Sxc6#
  • Tries
    • 1.Sxa4?
      • threat
        • 2.Qc3#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Qxa4+!
    • 1.Bxc6?
      • threat
        • 2.Sxf5#
      • 1...Be6
        • 2.Rxe4#
      • 1...Bg6
        • 2.Rd5#
      • 1...Bd7
        • 2.Rxe4#
        • 2.Rd5#
      • 1...Bh7
        • 2.Rd5#
      • 1...Bc8
        • 2.Rxe4#
        • 2.Rd5#
      • 1...Sh6!
    • 1.Qb2+?
      • 1...c3
        • 2.Qb4#
      • 1...Kxc5!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Qc3#
      • 1...Qxe4
        • 2.Sxf5#
      • 1...Bxe4
        • 2.Sxc6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(h);::S(G),XB(g)
    • B(g);::S(G),XQ(h)
  • Tries
    • Try
      • S(E);XP(b)
      • Threat
        • QAB1(C)
      • Vars
        • Q(h);N_GUARD,P_PINQ(C)::QAR2(C),XQ(h)
        • Q(h);N_GUARD,P_PINQ(C)::QAB1(C),XQ(h)
      • Refutation
        • Q(h);CHECK,XS(E)
    • Try
      • B(H);XQ(h)
      • Threat
        • S(G),XB(g)
      • Vars
        • B(g);N_GUARD::R1(D),XP(e)
        • B(g);OGATE::R1(F)
      • Refutation
        • S(f);
    • Try
      • Q(C);CHECK,N_PINP(c),P_PINP(e)
      • Vars
        • P(c);N_SPINP(e),OGATEB,P_SPINP(c)::QAR2(C)
      • Refutation
        • K(d);N_SPINP(e),P_SPINB(g),S_FLIGHT,XS(E)
  • Actual
    • S(E);XP(e)
    • Threat
      • QAB1(C)
    • Vars
      • Q(h);P_SPINQ(h),XS(E)::S(G),XB(g)
      • B(g);P_SPINB(g),XS(E)::S(G),XQ(h)
      • Q(h);N_GUARD,P_PINQ(C)::QAR2(C),XQ(h)
      • Q(h);N_GUARD,P_PINQ(C)::QAB1(C),XQ(h)
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