MESON Chess Problem Database

Problem Display
PID: 185 (4R2B/7Q/2q1n2P/1P1NPNp1/Rp2k1K1/1np5/B1P2P2/8 w - - 0 1)

Lender, Baruch

4th Prize, Israel Ring Ty., 1950/I

4R2B/7Q/2q1n2P/1P1NPNp1/Rp2k1K1/1np5/B1P2P2/8

#2

13 + 7

5978 Jerusalem Post 1950

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Sxc3#
    • 1...Qxd5
      • 2.f3#
    • 1...Qb7
      • 2.Sxc3#
    • 1...Qd7
      • 2.Sxc3#
    • 1...Qa8
      • 2.Sxc3#
    • 1...Qxe8
      • 2.Sxc3#
    • 1...Qa6
      • 2.Sxc3#
    • 1...Qb6
      • 2.Sxc3#
    • 1...Qd6
      • 2.Sxc3#
    • 1...Sa1
      • 2.f3#
    • 1...Sc1
      • 2.f3#
    • 1...Sbd4
      • 2.Sg3#
      • 2.Sd6#
    • 1...Sa5
      • 2.f3#
    • 1...Sbc5
      • 2.Sxc3#
      • 2.f3#
    • 1...Sec5
      • 2.Sxc3#
  • Tries
    • 1.Sde3?
      • threat
        • 2.f3#
      • 1...Sbd4
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sed4
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sd2!
    • 1.Sxb4?
      • threat
        • 2.f3#
      • 1...Sbd4
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sed4
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sd2!
    • 1.Bxb3?
      • threat
        • 2.f3#
      • 1...Sd4
        • 2.Sg3#
        • 2.Sd6#
      • 1...Qc4!
    • 1.Rxe6?
      • threat
        • 2.Sf6#
      • 1...Qxd5
        • 2.f3#
      • 1...Qxe6
        • 2.Sxc3#
      • 1...Kxd5!
    • 1.Qd7?
      • threat
        • 2.f3#
      • 1...Qxd7
        • 2.Sxc3#
      • 1...Qd6
        • 2.Sxc3#
      • 1...Sbd4
        • 2.Sg3#
      • 1...Sed4
        • 2.Sg3#
      • 1...Sd2!
    • 1.bxc6?
      • threat
        • 2.Sxc3#
      • 1...Sbd4
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sed4
        • 2.Sf6#
      • 1...Kxd5!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Sxc3#
      • 1...Kxd5
        • 2.Qxc6#
      • 1...Qxd5
        • 2.f3#
      • 1...Sbd4
        • 2.Sg3#
      • 1...Sed4
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • Q(f);N_GUARD,XP(F)::S(G),XP(b)
    • Q(f);SBLOCK,XS(G)::P(C)
    • Q(f);N_GUARD::S(G),XP(b)
    • Q(f);N_GUARD,XR(L)::S(G),XP(b)
    • S(a);::P(C)
    • S(g);S_CUTQ(f)::S(G),XP(b)
  • Tries
    • Try
      • S(G);
      • Threat
        • P(C)
      • Refutation
        • S(a);
    • Try
      • S(G);XP(c)
      • Threat
        • P(C)
      • Refutation
        • S(a);
    • Try
      • B(A);XS(a)
      • Threat
        • P(C)
      • Refutation
        • Q(f);N_SPINP(c)
    • Try
      • R(L);XS(g)
      • Threat
        • S(G)
      • Vars
        • Q(f);SBLOCK,XS(G)::P(C)
        • Q(f);N_GUARD,P_PINS(I),XR(L)::S(G),XP(b)
      • Refutation
        • K(d);N_SPINP(c),P_SPINS(a),S_FLIGHT,XS(G)
    • Try
      • Q(K);
      • Threat
        • P(C)
      • Vars
        • Q(f);N_GUARD,XQ(K)::S(G),XP(b)
        • Q(f);N_GUARD::S(G),XP(b)
        • S(a);N_SPINP(c),SBLOCK::S(I)
        • S(g);N_SPINP(c),SBLOCK::S(I)
      • Refutation
        • S(a);
    • Try
      • P(F);XQ(f)
      • Threat
        • S(G),XP(b)
      • Vars
        • S(g);N_SPINP(c)::S(G)
      • Refutation
        • K(d);N_SPINP(c),P_SPINS(a),S_FLIGHT,XS(G)
  • Actual
    • Q(K);
    • Threat
      • S(G),XP(b)
    • Vars
      • K(d);N_SPINP(c),OGATEB,P_SPINQ(f),P_SPINS(a),S_FLIGHT,XS(G)::QAB1(K),XQ(f)
      • Q(f);P_SPINQ(f),XS(G)::P(C)
      • S(a);N_SPINP(c),SBLOCK::S(I)
      • S(g);N_SPINP(c)::S(G)
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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).