MESON Chess Problem Database

Problem Display
PID: 213512 (2RR3Q/Bp1N1Pq1/rrP3pb/1P6/p2k1PK1/2n1N3/p2PP3/8 w - - 0 1)

Makihovi, Ilmari

Suomen Shakki, 1947

2RR3Q/Bp1N1Pq1/rrP3pb/1P6/p2k1PK1/2n1N3/p2PP3/8

#2

13 + 10

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sc5#
    • 1...Qe5
      • 2.Qxe5#
  • Tries
    • 1.Sc5+?
      • 1...Sd5
        • 2.Rxd5#
      • 1...Kxc5!
    • 1.Sf6+?
      • 1...Sd5
        • 2.Rxd5#
      • 1...Kc5!
    • 1.Bxb6+?
      • 1...Ke4
        • 2.Sc5#
        • 2.d3#
      • 1...Rxb6!
    • 1.Qxg7+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Sf6#
        • 2.Re8#
        • 2.Qe5#
      • 1...Bxg7!
    • 1.f8Q?
      • threat
        • 2.Qb4#
      • 1...Ke4
        • 2.Sc5#
      • 1...Sxe2
        • 2.Sc5#
      • 1...Sd5!
  • Keys
    • 1.cxb7!
      • threat
        • 2.Rc4#
      • 1...Ke4
        • 2.Sc5#
      • 1...Sxe2
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINQ(j),N_SPINR(f),P-FLIGHT::S(I)
    • Q(j);OGATE::QAB1(M),XQ(j)
  • Tries
    • Try
      • S(I);CHECK,N_PINR(f)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(L),XS(b)
      • Refutation
        • K(d);N_SPINQ(j),P_SPINR(f),S_FLIGHT,XS(I)
    • Try
      • S(I);CHECK,N_PINQ(j)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(L),XS(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(H);CHECK,XR(f)
      • Refutation
        • R(e);XB(H)
    • Try
      • Q(M);CHECK,XQ(j)
      • Refutation
        • B(h);XQ(M)
    • Try
      • P(J);
      • Threat
        • QAR2(J)
      • Vars
        • K(d);N_SPINQ(j),N_SPINR(f),P-FLIGHT::S(I)
        • S(b);N_GUARD,XP(B)::R(L)+S(I)
      • Refutation
        • S(b);
  • Actual
    • P(G);XP(i)
    • Threat
      • R1(K)
    • Vars
      • K(d);N_SPINQ(j),N_SPINR(f),P-FLIGHT::S(I)
      • S(b);N_GUARD,XP(B)::R(L)+S(I)
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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).