MESON Chess Problem Database

Problem Display
PID: 168459 (6n1/1K1B1p2/2p3r1/1p1kPp1b/1P3R2/7r/N1Q5/B5b1 w - - 0 1)

Petite, Efren

3rd HM., 04. FIDE Ty., 1962-1963

6n1/1K1B1p2/2p3r1/1p1kPp1b/1P3R2/7r/N1Q5/B5b1

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qb3#
    • 1...Rh2
      • 2.Qb3#
    • 1...Rb3
      • 2.Qxb3#
    • 1...Re3
      • 2.Qc5#
    • 1...Rh4
      • 2.Qb3#
    • 1...Rg2
      • 2.Qxc6#
    • 1...Rg3
      • 2.Qxc6#
    • 1...Rg4
      • 2.Qxc6#
    • 1...Rg5
      • 2.Qxc6#
    • 1...Rg7
      • 2.Qxc6#
    • 1...Bh2
      • 2.Qc5#
    • 1...Be3
      • 2.Qb3#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bf3
      • 2.Qb3#
    • 1...Sf6
      • 2.Qxc6#
    • 1...f6
      • 2.Qxc6#
  • Tries
    • 1.Bxc6+?
      • 1...Rxc6
        • 2.Qxc6#
      • 1...Ke6!
    • 1.Rd4+?
      • 1...Kxe5
        • 2.Qxf5#
      • 1...Bxd4!
    • 1.Qd3+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Rxd3!
    • 1.Qd2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Rd3!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Qe4#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Re3
        • 2.Rd4#
      • 1...Bf3
        • 2.Sc3#
      • 1...Sf6
        • 2.Bxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 13
  • Sets
    • R(b);N_GUARD::QAB(C)
    • R(b);N_GUARD::QAB(C),XR(b)
    • R(b);S_CUTB(a)::QAR1(C)
    • R(h);N_GUARD::QAB1(C),XP(g)
    • B(a);N_GUARD::QAR1(C)
    • B(a);S_CUTR(b)::QAB(C)
    • B(a);N_GUARD::QAR1(C),XB(a)
    • B(f);S_CUTR(b)::QAB(C)
    • S(j);S_CUTR(h)::QAB1(C),XP(g)
    • P(i);S_CUTR(h)::QAB1(C),XP(g)
  • Tries
    • Try
      • B(H);CHECK,XP(g)
      • Vars
        • R(h);OGATE,XB(H)::QAB1(C),XR(h)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(E);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR1(C),XP(e)
      • Refutation
        • B(a);XR(E)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(C),XB(a)
      • Refutation
        • R(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(C),XB(a)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • Q(C);XP(e)
    • Threat
      • QAB1(C)
    • Vars
      • B(a);N_GUARD::R1(E),XB(a)
      • R(b);S_CUTB(a)::R1(E)
      • B(f);S_CUTR(b)::S(B)
      • S(j);S_CUTR(h)::B(H),XP(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).