MESON Chess Problem Database

Problem Display
PID: 23930 (4B3/p1r1P2q/Q7/1p1kNnR1/3bNKP1/8/7p/3R4 w - - 0 1)

Savournin, Jacques

3rd Comm., Phenix, 1996

4B3/p1r1P2q/Q7/1p1kNnR1/3bNKP1/8/7p/3R4

#2

9 + 8

15 British Chess Magazine 1994
1099 WCSC 1994
5396 World Chess Solving Championship 1977-1996 1997
23 Die Schwalbe 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Bf7#
    • 1...Qh4
      • 2.Bf7#
    • 1...Qf7
      • 2.Bxf7#
    • 1...Qh8
      • 2.Bf7#
    • 1...Rc5
      • 2.Sf6#
    • 1...Rc6
      • 2.Qxc6#
    • 1...Rb7
      • 2.Qa2#
      • 2.Qc6#
    • 1...Rd7
      • 2.Qa2#
      • 2.Qc6#
    • 1...Rxe7
      • 2.Qa2#
      • 2.Qc6#
    • 1...Se3
      • 2.Qd6#
    • 1...Sg3
      • 2.Qd6#
    • 1...Sh4
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sh6
      • 2.Qd6#
    • 1...Sxe7
      • 2.Qd6#
    • 1...Sg7
      • 2.Qd6#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Rxd4#
      • 1...Kc4
        • 2.Qxb5#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Qh8
        • 2.Bf7#
      • 1...Rc4
        • 2.Qd6#
      • 1...Qg7!
    • 1.Sc6?
      • threat
        • 2.Qa2#
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke6
        • 2.Qa2#
      • 1...Rxc6
        • 2.Qxc6#
      • 1...Qh3
        • 2.Bf7#
      • 1...b4
        • 2.Sxb4#
      • 1...Rd7!
    • 1.Bc6+?
      • 1...Rxc6
        • 2.Qxc6#
      • 1...Ke6!
    • 1.Rxd4+?
      • 1...Sxd4
        • 2.Qd6#
      • 1...Kxd4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Qxb5#
      • 1...Rxc4
        • 2.Qd6#
      • 1...bxc4
        • 2.Qd6#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Qh3
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(h);N_GUARD::B(I)
    • Q(h);N_GUARD,P_PINP(D)::B(I)
    • Q(h);N_GUARD::B(I),XQ(h)
    • R(g);SBLOCK::S(B)
    • R(g);N_GUARD::QAB1(G),XR(g)
    • S(e);N_GUARD::QAR1(G)
    • S(e);N_GUARD::QAR1(G),XS(e)
    • S(e);N_GUARD,XP(H)::QAR1(G)
  • Tries
    • Try
      • S(E);P_PINS(e)
      • Threat
        • R1(A),XB(b)
      • Vars
        • K(d);N_SPINB(b),N_SPINS(e),P_SPINP(c),S_FLIGHT::QAB1(G),XP(c)
        • R(g);N_GUARD::QAB1(G),XR(g)
        • Q(h);N_GUARD::B(I)
        • R(g);SBLOCK::QAR1(G)
      • Refutation
        • Q(h);
    • Try
      • S(E);P_PINS(e)
      • Threat
        • QAB(G)
      • Vars
        • K(d);N_SPINB(b),N_SPINS(e),P_SPINP(c),S_FLIGHT::QAB(G)
        • K(d);N_SPINB(b),N_SPINS(e),S_FLIGHT::QAB(G)
        • R(g);OGATE,XS(E)::QAB1(G),XR(g)
        • Q(h);N_GUARD::B(I)
        • P(c);::S(E),XP(c)
      • Refutation
        • R(g);
    • Try
      • B(I);CHECK
      • Vars
        • R(g);OGATE,XB(I)::QAB1(G),XR(g)
      • Refutation
        • K(d);N_SPINB(b),S_FLIGHT
    • Try
      • R(A);CHECK,XB(b)
      • Vars
        • S(e);SBLOCK,XR(A)::QAR1(G)
      • Refutation
        • K(d);P-FLIGHT,XR(A)
  • Actual
    • S(E);P_PINS(e)
    • Threat
      • S(E)
    • Vars
      • K(d);N_SPINB(b),N_SPINS(e),P_SPINP(c),S_FLIGHT,XS(E)::QAB1(G),XP(c)
      • R(g);SBLOCK,XS(E)::QAR1(G)
      • P(c);SBLOCK,XS(E)::QAR1(G)
      • R(g);N_GUARD::QAB1(G),XR(g)
      • Q(h);N_GUARD::B(I)
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