MESON Chess Problem Database

Problem Display
PID: 42631 (8/2R5/8/2B3p1/4P2p/1pk3qQ/1N2P3/1R1KN3 w - - 0 1)

Savournin, Jacques

3rd Prize, BCF 092. Ty., 1959-1960

8/2R5/8/2B3p1/4P2p/1pk3qQ/1N2P3/1R1KN3

#2

9 + 5

3749 FIDE Album (1959-1961) 1966
56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3+
      • 2.Qxd3#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qf3
      • 2.Qxf3#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Bg1#
        • 2.Bf2#
        • 2.Ba3#
        • 2.Bb4#
        • 2.Bd4#
        • 2.Bb6#
        • 2.Bd6#
        • 2.Ba7#
        • 2.Be7#
        • 2.Bf8#
      • 1...Qd3+
        • 2.Qxd3#
      • 1...Qe3
        • 2.Ba3#
        • 2.Bxe3#
        • 2.Bb4#
        • 2.Bd4#
        • 2.Bb6#
        • 2.Bd6#
        • 2.Ba7#
        • 2.Be7#
        • 2.Bf8#
        • 2.Qxe3#
      • 1...bxc2+!
    • 1.Sf3?
      • threat
        • 2.Bd6#
      • 1...Qe1+
        • 2.Sxe1#
      • 1...Qd6+
        • 2.Bxd6#
      • 1...Qg1+
        • 2.Sxg1#
      • 1...Qxc7
        • 2.Se5#
      • 1...Qxf3
        • 2.Qxf3#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Qf2!
  • Keys
    • 1.Sed3!
      • threat
        • 2.Rc1#
      • 1...Qe1+
        • 2.Sxe1#
      • 1...Qg1+
        • 2.Bxg1#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Qe3
        • 2.Bxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(c);CHECK,OGATE::QAR1(F),XQ(c)
    • Q(c);OGATE::QAR2(F),XQ(c)
    • Q(c);OGATE,P_PINP(E)::QAR(F),XQ(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(10)
      • Vars
        • Q(c);CHECK,OGATE::QAR1(F),XQ(c)
      • Refutation
        • P(a);CHECK,XS(C)
    • Try
      • S(C);N_PINQ(c)
      • Threat
        • R(I)+B(H)
      • Vars
        • Q(c);CHECK::QAR(F)+S(C),XQ(c)
        • Q(c);CHECK::R(I)+B(H),XQ(c)
        • Q(c);XR(I)::QAR(F)+S(C)
        • Q(c);OGATE,P_PINP(E),P_SPINQ(c),XS(C)::QAR(F),XQ(c)
        • Q(c);::QAR(F)+S(C),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • S(C);N_PINQ(c)
    • Threat
      • R(A)
    • Vars
      • Q(c);CHECK::QAR(F)+S(C),XQ(c)
      • Q(c);CHECK,N_GUARD::R(I)+B(H),XQ(c)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(C)::QAR1(F),XQ(c)
      • Q(c);::QAR(F)+S(C),XQ(c)
      • Q(c);N_GUARD::R(I)+B(H),XQ(c)
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