MESON Chess Problem Database

Problem Display
PID: 250258 (1K1Bb3/1R1p4/k3q2R/N1p1p3/1p5r/3r2P1/4B2b/7Q w - - 0 1)

Nagy, Odon

1st Prize, Magyar Sakkvilag, 1927

1K1Bb3/1R1p4/k3q2R/N1p1p3/1p5r/3r2P1/4B2b/7Q

#2

8 + 10

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6+
      • 2.Rxd6#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Sxc5#
        • 2.Qa1#
      • 1...Qd6+
        • 2.Rxd6#
      • 1...Qb6
        • 2.Rhxb6#
        • 2.Rbxb6#
      • 1...Rc4
        • 2.Qa1#
      • 1...c4
        • 2.Sc5#
        • 2.Qa1#
      • 1...d5
        • 2.Sxc5#
      • 1...d6
        • 2.Rb6#
      • 1...Bg1!
    • 1.Bxd3+?
      • 1...Rc4
        • 2.Bxc4#
      • 1...c4!
    • 1.Rb6+?
      • 1...Kxa5
        • 2.Qa8#
      • 1...Qxb6+!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sb3#
      • 1...Qd6+
        • 2.Rxd6#
      • 1...Qb6
        • 2.Rhxb6#
        • 2.Rbxb6#
      • 1...b3
        • 2.Sc4#
      • 1...d5
        • 2.Sc6#
      • 1...d6
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(h);CHECK,OGATE::R(E),XQ(h)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);CHECK,OGATE::R(E),XQ(h)
        • R(d);N_SPINR(b)::QAR(A)
        • P(i);::S(D),XP(e)
        • P(i);N_SPINQ(h),S_CUTQ(h)::R1(F)
      • Refutation
        • B(a);
    • Try
      • B(B);CHECK,XR(b)
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::B(B),XR(d)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • R(F);CHECK,N_PINQ(h)
      • Vars
        • K(g);N_SPINR(b),P-FLIGHT,XS(D)::QAR(A)
      • Refutation
        • Q(h);CHECK,P_SPINQ(h),XR(F)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(D)
    • Vars
      • Q(h);CHECK,OGATE::R(E),XQ(h)
      • P(c);::QAR(A)+S(D)
      • P(i);::QAR(A)+S(D)
      • P(i);N_SPINQ(h),S_CUTQ(h)::R1(F)
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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).