MESON Chess Problem Database

Problem Display
PID: 99884 (2B5/b7/2N4N/1r1p1PB1/Rq1nk3/5p1K/2P2P2/1Q6 w - - 0 1)

Hirschenson, Aaron

Budapesti Sakkszovetseg, 1986

2B5/b7/2N4N/1r1p1PB1/Rq1nk3/5p1K/2P2P2/1Q6

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qxe1#
    • 1...Qc5
      • 2.Qe1#
    • 1...Qd6
      • 2.Qe1#
    • 1...Qe7
      • 2.Qe1#
    • 1...Qf8
      • 2.Qe1#
    • 1...Qb2
      • 2.Qe1#
    • 1...Qb3
      • 2.cxb3#
    • 1...Sxc2
      • 2.Qxc2#
    • 1...Se2
      • 2.c3#
    • 1...Sb3
      • 2.cxb3#
      • 2.c3#
      • 2.c4#
    • 1...Sxf5
      • 2.Bxf5#
      • 2.c3#
    • 1...Se6
      • 2.c3#
  • Tries
    • 1.Sg8?
      • threat
        • 2.Sf6#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Se6
        • 2.c3#
      • 1...Qd6
        • 2.Qe1#
      • 1...Qe7
        • 2.Qe1#
      • 1...Qf8
        • 2.Qe1#
      • 1...Sxc6!
    • 1.Qxb4?
      • threat
        • 2.Qe1#
        • 2.Qe7#
      • 1...Rc5
        • 2.Qe1#
        • 2.Qxd4#
      • 1...Rb7
        • 2.Qe1#
      • 1...Bc5
        • 2.Qe1#
      • 1...Bb8
        • 2.Qe1#
        • 2.Qxd4#
      • 1...Rxb4!
    • 1.c3+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Qxb1!
    • 1.c4+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Qxb1!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Sxc6
        • 2.c3#
      • 1...Se6
        • 2.c3#
      • 1...Qd6
        • 2.Qe1#
      • 1...Qe7
        • 2.Qe1#
      • 1...Qf8
        • 2.Qe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(b);N_GUARD,P_SPINS(c)::QAR(A),XQ(b)
    • Q(b);N_GUARD,P_SPINS(c)::QAR(A)
    • Q(b);OGATE,P_SPINS(c)::QAB(A)+P(B),XQ(b)
    • S(c);OGATE,P_SPINQ(b),P_SPINS(c),XP(B)::QAB(A),XS(c)
    • S(c);N_GUARD,P_SPINQ(b)::QAB(A)+P(B)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • S(c);OGATE,P_SPINQ(b),P_SPINS(c),XP(B)::QAB(A),XS(c)
        • S(c);N_GUARD,P_SPINQ(b)::QAB(A)+P(B)
        • Q(b);N_GUARD,P_SPINS(c)::QAR(A)
      • Refutation
        • S(c);P_SPINQ(b),XS(H)
    • Try
      • Q(A);P_PINS(c),XQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);::QAR(A)
        • B(g);::QAR(A)
      • Refutation
        • R(e);N_SPINS(c),XQ(A)
    • Try
      • P(B);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINQ(b),P_SPINS(c)::QAB(A),XS(c)
      • Refutation
        • Q(b);P_SPINS(c),XQ(A)
    • Try
      • P(B);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(A),XS(c)
      • Refutation
        • Q(b);XQ(A)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • S(c);OGATE,P_SPINQ(b),P_SPINS(c),XP(B)::QAB(A),XS(c)
      • S(c);N_GUARD,P_SPINQ(b),XS(H)::QAB(A)+P(B)
      • S(c);N_GUARD,P_SPINQ(b)::QAB(A)+P(B)
      • Q(b);N_GUARD,P_SPINS(c)::QAR(A)
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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).