MESON Chess Problem Database

Problem Display
PID: 61126 (7K/4p2N/B7/1N1R2p1/2P1k1P1/2R2nP1/3P2nr/q6Q w - - 0 1)

Loshinski, Lev Ilich

64 Shakhmatnoe obozrenie, 1929

7K/4p2N/B7/1N1R2p1/2P1k1P1/2R2nP1/3P2nr/q6Q

#2

11 + 7

5314 Grossmeister Shakhmatnoi Kompozitsii 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3+
      • 2.Sxc3#
    • 1...Qb1
      • 2.Qxb1#
    • 1...Qa3
      • 2.Qb1#
    • 1...Qa5
      • 2.Qb1#
    • 1...Qxa6
      • 2.Qb1#
    • 1...Rxh7+
      • 2.Qxh7#
    • 1...Se3
      • 2.d3#
    • 1...Sf4
      • 2.Qxf3#
    • 1...Sgh4
      • 2.Sxg5#
    • 1...Sd4
      • 2.Re3#
    • 1...Sfh4
      • 2.Sxg5#
    • 1...Se5
      • 2.Re3#
      • 2.Rd4#
    • 1...e5
      • 2.Sd6#
    • 1...e6
      • 2.Sd6#
  • Tries
    • 1.Rd4+?
      • 1...Sxd4
        • 2.Re3#
      • 1...Ke5!
    • 1.Re5+?
      • 1...Sxe5
        • 2.Re3#
      • 1...Kxe5!
  • Keys
    • 1.Bc8!
      • threat
        • 2.Bf5#
      • 1...Qxc3+
        • 2.Sxc3#
      • 1...Rxh7+
        • 2.Qxh7#
      • 1...Qa8
        • 2.Qb1#
      • 1...Se3
        • 2.d3#
      • 1...Sgh4
        • 2.Sxg5#
      • 1...Sd4
        • 2.Re3#
      • 1...Sfh4
        • 2.Sxg5#
      • 1...e6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(a);CHECK,XR(C)::S(G),XQ(a)
    • Q(a);N_GUARD,N_PINR(C)::QAB(A),XQ(a)
    • Q(a);N_GUARD,N_PINR(C)::QAB(A)
    • Q(a);N_GUARD,N_PINR(C),XB(I)::QAB(A)
    • R(c);CHECK,OGATE,XS(J)::QAB(A),XR(c)
    • S(b);P_SPINS(d),SBLOCK::P(B)
    • S(b);OGATE,P_SPINS(d)::QAB1(A),XS(d)
    • S(b);N_PINS(J),P_SPINS(d)::S(J),XP(f)
    • S(d);N_PINR(C),P_SPINS(b)::R1(C)
    • S(d);N_PINS(J),P_SPINS(b)::S(J),XP(f)
    • P(g);N_GUARD,N_PINR(C)::S(G)
    • P(g);N_GUARD::S(G)
  • Tries
    • Try
      • R(H);CHECK,N_SPINR(C)
      • Vars
        • S(d);P_SPINS(b),XR(H)::R1(C)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(H);CHECK,N_SPINR(C)
      • Vars
        • S(d);P_SPINS(b),SBLOCK,XR(H)::R1(C)
      • Refutation
        • K(e);P-FLIGHT,XR(H)
  • Actual
    • B(I);
    • Threat
      • B(I)
    • Vars
      • Q(a);CHECK,XR(C)::S(G),XQ(a)
      • R(c);CHECK,OGATE,XS(J)::QAB(A),XR(c)
      • Q(a);N_GUARD,N_PINR(C),P_PINB(I)::QAB(A)
      • S(b);P_SPINS(d),SBLOCK::P(B)
      • S(b);N_PINS(J),P_SPINS(d)::S(J),XP(f)
      • S(d);N_PINR(C),P_SPINS(b)::R1(C)
      • S(d);N_PINS(J),P_SPINS(b)::S(J),XP(f)
      • P(g);N_GUARD::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).