MESON Chess Problem Database

Problem Display
PID: 80911 (Kb1n4/7N/6R1/1B1k4/6N1/1p6/5B2/2n1Qb1q w - - 0 1)

Savournin, Jacques

HM., diagrammes, 1974

Kb1n4/7N/6R1/1B1k4/6N1/1p6/5B2/2n1Qb1q

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.Qxh1#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bd6
      • 2.Sgf6#
      • 2.Shf6#
    • 1...Ba7
      • 2.Qe5#
    • 1...Sc6
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qe6#
    • 1...Sf7
      • 2.Qe6#
  • Tries
    • 1.Bc4+?
      • 1...Bxc4
        • 2.Qxh1#
      • 1...Kxc4+!
    • 1.Bc6+?
      • 1...Sxc6
        • 2.Qe6#
      • 1...Kc4!
    • 1.Rg5+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Kd6+!
    • 1.Rd6+?
      • 1...Bxd6
        • 2.Sgf6#
        • 2.Shf6#
      • 1...Kxd6+!
    • 1.Qc3?
      • threat
        • 2.Qd4#
      • 1...Se6
        • 2.Qc6#
      • 1...Qe4
        • 2.Qc5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Ba7
        • 2.Qe5#
      • 1...Se2
        • 2.Qc4#
      • 1...Sc6
        • 2.Bxc6#
        • 2.Qxc6#
      • 1...Ke4!
    • 1.Qe3?
      • threat
        • 2.Qd4#
      • 1...Se6
        • 2.Qxe6#
      • 1...Qe4
        • 2.Qc5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Ba7
        • 2.Qe5#
      • 1...Sc6
        • 2.Qe6#
      • 1...Se2!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qd4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Qe4
        • 2.Qc5#
      • 1...Be5
        • 2.Se3#
      • 1...Ba7
        • 2.Rd6#
      • 1...Se2
        • 2.Qc4#
      • 1...Sc6
        • 2.Bxc6#
      • 1...Se6
        • 2.Shf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);OGATE::QAB(A),XQ(c)
    • B(f);N_GUARD::QAR1(A),XB(f)
    • B(f);N_GUARD::QAR1(A)
    • S(g);N_GUARD::QAB1(A)
    • S(g);N_GUARD::QAB1(A),XS(g)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • B(b);OGATE,SBLOCK,XB(D)::QAB(A),XQ(c)
      • Refutation
        • K(e);CHECK,S_FLIGHT,XB(D)
    • Try
      • B(D);CHECK
      • Vars
        • S(g);XB(D)::QAB1(A)
      • Refutation
        • K(e);P_PINB(D),S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(A),XB(f)
      • Refutation
        • K(e);CHECK,P-FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(e);CHECK,P-FLIGHT,XR(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(g);N_GUARD::QAB1(A)
        • Q(c);SBLOCK::QAR1(A)
        • B(f);N_GUARD::QAR1(A),XB(f)
        • B(f);N_GUARD::QAR1(A)
        • S(a);S_CUTB(b)::QAB1(A)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(g);N_GUARD::QAB1(A),XS(g)
        • Q(c);SBLOCK::QAR1(A)
        • B(f);N_GUARD::QAR1(A),XB(f)
        • B(f);N_GUARD::QAR1(A)
        • S(g);N_GUARD::QAB1(A)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(b);N_GUARD::QAB1(A),XB(b)
      • Q(c);SBLOCK::QAR1(A)
      • B(f);SBLOCK::S(C)
      • B(f);N_GUARD::R1(E)
      • S(a);S_CUTB(b)::QAB1(A)
      • S(g);N_GUARD::B(D),XS(g)
      • S(g);SBLOCK::S(F)
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