MESON Chess Problem Database

Problem Display
PID: 114112 (4br1B/6n1/K2p4/1p4Rp/4k3/1R1Np1Q1/BP6/5n2 w - - 0 1)

Stocchi, Ottavio

1st HM., To Mat, 1952

4br1B/6n1/K2p4/1p4Rp/4k3/1R1Np1Q1/BP6/5n2

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rg8
      • 2.Qf4#
    • 1...Rxh8
      • 2.Qf4#
    • 1...Bf7
      • 2.Qf4#
    • 1...Sf5
      • 2.Qg2#
    • 1...e2
      • 2.Rb4#
  • Tries
    • 1.Sf2+?
      • 1...Kd4
        • 2.Rd3#
        • 2.Rb4#
      • 1...exf2
        • 2.Rb4#
      • 1...Rxf2!
    • 1.Sc5+?
      • 1...Kd4
        • 2.Rd3#
        • 2.Rb4#
      • 1...dxc5!
    • 1.Qh4+?
      • 1...Rf4
        • 2.Qxf4#
      • 1...Kf3!
    • 1.Qg2+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Rf3!
    • 1.Qg4+?
      • 1...Rf4
        • 2.Qxf4#
      • 1...hxg4!
  • Keys
    • 1.Se1!
      • threat
        • 2.Rb4#
      • 1...Kd4
        • 2.Rb4#
      • 1...Bf7
        • 2.Qh4#
      • 1...Sd2
        • 2.Qxe3#
      • 1...Sf5
        • 2.Qf3#
      • 1...Se6
        • 2.Bb1#
      • 1...b4
        • 2.Rxb4#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(i);N_GUARD::QAR1(E),XR(i)
    • R(i);N_GUARD::QAR1(E)
    • R(i);N_GUARD,XB(H)::QAR1(E)
    • B(h);S_CUTR(i)::QAR1(E)
    • S(g);S_CUTR(i)::QAB(E)
    • P(b);::R(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • P(b);XS(D)::R(C)
      • Refutation
        • R(i);XS(D)
    • Try
      • S(D);CHECK
      • Refutation
        • P(f);XS(D)
    • Try
      • Q(E);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(E),XR(i)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT,P_SPINS(g)::QAR1(E)
      • Refutation
        • R(i);P_SPINR(i)
    • Try
      • Q(E);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAR1(E),XR(i)
      • Refutation
        • P(e);XQ(E)
  • Actual
    • S(D);
    • Threat
      • R(C)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(g)::R(C)
      • B(h);S_CUTR(i)::QAR(E)
      • S(a);N_GUARD::QAR1(E),XP(b)
      • S(g);S_CUTR(i)::QAB1(E)
      • S(g);::B(A)
      • P(d);::R(C),XP(d)
      • P(f);N_GUARD::QAR1(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).