MESON Chess Problem Database

Problem Display
PID: 168280 (r1B1R2K/1QNNP3/r2k4/2p1pn2/2p1R3/7p/1b2n3/B4q2 w - - 0 1)

Petite, Efren

Il Due Mosse, 1958

r1B1R2K/1QNNP3/r2k4/2p1pn2/2p1R3/7p/1b2n3/B4q2

#2

9 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa1
      • 2.Qb6#
    • 1...Ra2
      • 2.Qb6#
    • 1...Ra3
      • 2.Qb6#
    • 1...Ra4
      • 2.Qb6#
    • 1...Ra5
      • 2.Qb6#
    • 1...Rb6
      • 2.Qxb6#
    • 1...R6a7
      • 2.Qb6#
    • 1...Bc1
      • 2.Bxe5#
    • 1...Ba3
      • 2.Bxe5#
  • Tries
    • 1.Sxe5?
      • threat
        • 2.Sb5#
      • 1...Bxe5+
        • 2.Bxe5#
      • 1...Ra5
        • 2.Qc6#
        • 2.Qb6#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Sc3
        • 2.Sf7#
      • 1...Sed4
        • 2.Sf7#
      • 1...Sfd4
        • 2.Sxc4#
      • 1...Rxc8!
    • 1.Qxa6+?
      • 1...Kxc7
        • 2.Qb6#
      • 1...Rxa6!
  • Keys
    • 1.Rxe5!
      • threat
        • 2.Sb5#
      • 1...Bxe5+
        • 2.Bxe5#
      • 1...Sc3
        • 2.Re6#
      • 1...Ra5
        • 2.Qb6#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Sed4
        • 2.Rd5#
      • 1...Sfd4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(i);N_GUARD,XB(A)::QAR2(C)
    • R(i);N_GUARD::QAR2(C)
    • R(i);N_GUARD::QAR2(C),XR(i)
    • B(b);OGATE::B(A),XP(g)
  • Tries
    • Try
      • S(E);P_SPINS(E),XP(g)
      • Threat
        • S(D)
      • Vars
        • B(b);CHECK,OGATE,XS(E)::B(A),XB(b)
        • R(i);N_GUARD::QAR2(C),XR(i)
        • R(i);N_GUARD::QAR1(C),XR(i)
        • S(c);N_PINS(E)::S(E)
        • S(h);N_PINS(E)::S(E),XP(e)
      • Refutation
        • R(k);P_PINR(H),XB(G)
    • Try
      • Q(C);CHECK,XR(i)
      • Vars
        • K(j);S_FLIGHT,XS(D)::QAB1(C)
      • Refutation
        • R(k);XQ(C)
  • Actual
    • R(B);P_SPINR(B),XP(g)
    • Threat
      • S(D)
    • Vars
      • B(b);CHECK,OGATE,XR(B)::B(A),XB(b)
      • S(c);N_PINR(B)::R1(B)
      • R(i);N_GUARD::QAR2(C)
      • R(i);N_GUARD::QAR2(C),XR(i)
      • S(h);N_PINR(B)::R1(B)
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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).