MESON Chess Problem Database

Problem Display
PID: 47180 (3Q4/1p2N3/p3p3/4p3/4kp2/2np1R2/p1R2nK1/B7 w - - 0 1)

Michel, Francois

4th Comm., Themes-64, 1956

3Q4/1p2N3/p3p3/4p3/4kp2/2np1R2/p1R2nK1/B7

#2

6 + 10

136 Problem Observer 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sfd1
      • 2.Qxd3#
    • 1...Sh1
      • 2.Qxd3#
    • 1...Sh3
      • 2.Qxd3#
    • 1...Sg4
      • 2.Qxd3#
    • 1...Sb1
      • 2.Rc4#
    • 1...Scd1
      • 2.Rc4#
    • 1...Sa4
      • 2.Rc4#
    • 1...Sd5
      • 2.Rc4#
  • Tries
    • 1.Kxf2?
      • threat
        • 2.Qxd3#
      • 1...dxc2
        • 2.Qd3#
      • 1...Sd5
        • 2.Rc4#
      • 1...d2
        • 2.Qd3#
      • 1...Sd1+!
    • 1.Rcxf2?
      • threat
        • 2.Qxd3#
      • 1...d2
        • 2.Qd3#
      • 1...Sd5!
    • 1.Qb6?
      • threat
        • 2.Qb4#
      • 1...Se2
        • 2.Qxb7#
      • 1...Sb5
        • 2.Qxb7#
      • 1...Sd5
        • 2.Rc4#
      • 1...a5!
    • 1.Qd5+?
      • 1...Sxd5
        • 2.Rc4#
      • 1...exd5!
    • 1.Qd6?
      • threat
        • 2.Qb4#
      • 1...Se2
        • 2.Qxe5#
      • 1...Sb5
        • 2.Qxe5#
      • 1...Sd5
        • 2.Rc4#
        • 2.Qxe5#
      • 1...a5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qb4#
      • 1...Kd4
        • 2.Qb4#
      • 1...Se2
        • 2.Qxe5#
      • 1...Sb5
        • 2.Qe1#
      • 1...Sd5
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(b);N_GUARD::QAB1(F),XP(d)
    • S(c);OGATE::R(B)
  • Tries
    • Try
      • K(C);P-FLIGHT,XS(b)
      • Threat
        • QAB1(F),XP(d)
      • Vars
        • P(d);XR(B)::QAB1(F)
        • S(c);OGATE::R(B)
        • P(d);::QAB1(F)
      • Refutation
        • S(c);CHECK
    • Try
      • R(B);XS(b)
      • Threat
        • QAB1(F),XP(d)
      • Vars
        • P(d);::QAB1(F)
      • Refutation
        • S(c);
    • Try
      • Q(F);
      • Threat
        • QAR(F)
      • Vars
        • S(c);N_GUARD::QAB(F),XP(j)
        • S(c);OGATE::R(B)
      • Refutation
        • P(h);
    • Try
      • Q(F);CHECK
      • Vars
        • S(c);OGATE,XQ(F)::R(B)
      • Refutation
        • P(i);XQ(F)
    • Try
      • Q(F);
      • Threat
        • QAR(F)
      • Vars
        • S(c);::QAR1(F),XP(g)
      • Refutation
        • P(h);
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • K(e);P-FLIGHT,P_SPINS(c)::QAR2(F)
      • S(c);::QAR1(F),XP(g)
      • S(c);OGATE::QAR(F)
      • S(c);OGATE::R(B)
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