MESON Chess Problem Database

Problem Display
PID: 99591 (1nBbQ1N1/1p2p2p/pP2P1pP/P1pkP1K1/2R1R3/8/8/8 w - - 0 1)

Savournin, Jacques

3rd Prize, Pest megyei Sakkszovetseg, 1966

1nBbQ1N1/1p2p2p/pP2P1pP/P1pkP1K1/2R1R3/8/8/8

#2

11 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb6
      • 2.Sxe7#
    • 1...Bc7
      • 2.Sxe7#
    • 1...Sc6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
  • Tries
    • 1.Kf4?
      • 1...Bxb6
        • 2.Sxe7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bc7
        • 2.Sxe7#
      • 1...Sc6
        • 2.Qd7#
      • 1...g5+!
    • 1.Kg4?
      • 1...Bxb6
        • 2.Sxe7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bc7
        • 2.Sxe7#
      • 1...Sc6
        • 2.Qd7#
      • 1...g5!
    • 1.Kh4?
      • 1...Bxb6
        • 2.Sxe7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bc7
        • 2.Sxe7#
      • 1...Sc6
        • 2.Qd7#
      • 1...g5+!
    • 1.Bxb7+?
      • 1...Sc6
        • 2.Qxc6#
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Bd7?
      • 1...Bxb6
        • 2.Sxe7#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Bc7
        • 2.Sxe7#
      • 1...Sc6!
    • 1.Ra4?
      • 1...Bxb6
        • 2.Sxe7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bc7
        • 2.Sxe7#
      • 1...Sc6
        • 2.Qd7#
      • 1...c4!
    • 1.Qa4?
      • 1...Bxb6
        • 2.Sxe7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Bc7
        • 2.Sxe7#
      • 1...Sc6!
    • 1.Qb5?
      • threat
        • 2.Rcd4#
        • 2.Qxc5#
      • 1...Bxb6
        • 2.Sxe7#
        • 2.Rcd4#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sc6
        • 2.Qxc5#
      • 1...axb5!
    • 1.Qxd8+?
      • 1...Sd7
        • 2.Qxd7#
      • 1...Kc6!
  • Keys
    • 1.Qxe7!
      • 1...Bxe7+
        • 2.Sxe7#
      • 1...Kc6
        • 2.Rxc5#
      • 1...Bxb6
        • 2.Qd6#
      • 1...Sc6
        • 2.Sf6#
      • 1...Bc7
        • 2.Qxc5#
      • 1...Sd7
        • 2.Bxb7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(i);N_GUARD,XP(F)::S(K),XP(f)
    • B(i);N_GUARD::S(K),XP(f)
    • S(h);N_GUARD::QAR2(J)
    • S(h);N_GUARD::QAR2(J),XS(h)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • B(i);N_GUARD,XP(F)::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J),XS(h)
        • B(i);N_GUARD,P_PINP(D)::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J)
      • Refutation
        • P(d);CHECK
    • Try
      • K(E);P-FLIGHT
      • Vars
        • B(i);N_GUARD,XP(F)::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J),XS(h)
        • B(i);N_GUARD::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J)
      • Refutation
        • P(d);
    • Try
      • K(E);S_FLIGHT
      • Vars
        • B(i);N_GUARD,XP(F)::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J),XS(h)
        • B(i);N_GUARD::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J)
      • Refutation
        • P(d);CHECK
    • Try
      • B(I);CHECK,XP(e)
      • Refutation
        • K(b);P_SPINP(f),S_FLIGHT,XP(G)
    • Try
      • B(I);
      • Vars
        • B(i);N_GUARD,XP(F)::S(K),XP(f)
        • S(h);OGATE,XB(I)::QAR2(J),XS(h)
        • B(i);N_GUARD::S(K),XP(f)
      • Refutation
        • S(h);
    • Try
      • R(A);
      • Vars
        • B(i);N_GUARD,XP(F)::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J),XS(h)
        • B(i);N_GUARD::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J)
      • Refutation
        • P(a);
    • Try
      • Q(J);
      • Vars
        • B(i);N_GUARD,XP(F)::S(K),XP(f)
        • S(h);N_GUARD::QAR2(J),XS(h)
        • B(i);N_GUARD::S(K),XP(f)
      • Refutation
        • S(h);
    • Try
      • Q(J);P_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);N_GUARD::QAR2(J),XS(h)
        • S(h);::QAR1(J),XP(a)
      • Refutation
        • P(c);N_SPINP(a),XQ(J)
    • Try
      • Q(J);CHECK,XB(i)
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAR2(J),XS(h)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • Q(J);P_SPINQ(J),XP(f)
    • Vars
      • B(i);CHECK,XQ(J)::S(K),XB(i)
      • K(b);P_SPINP(a),S_FLIGHT::R1(A),XP(a)
      • B(i);N_PINQ(J),XP(F)::QAR1(J)
      • S(h);SBLOCK::S(K)
      • B(i);N_PINQ(J)::QAR1(J),XP(a)
      • S(h);N_GUARD::B(I),XP(e)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).