MESON Chess Problem Database

Problem Display
PID: 197832 (8/8/8/8/QNp5/2P5/2rB1Kn1/2rk1N2 w - - 0 1)

Gnilka, Thomas

Rhein-Neckar-Zeitung, 2001

(First published on Sat Mar 10 2001)

8/8/8/8/QNp5/2P5/2rB1Kn1/2rk1N2

#2

6 + 5

16210 Problemschach-Jahrbuch (2001) 2002
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxc2#
    • 1...Rb1
      • 2.Qxc2#
  • Tries
    • 1.Sxc2?
      • threat
        • 2.Sce3#
      • 1...Se3
        • 2.Scxe3#
      • 1...Rxc2!
    • 1.Sd3?
      • threat
        • 2.Sb2#
      • 1...cxd3
        • 2.Qg4#
      • 1...Rb1!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qg4#
      • 1...Rxd2+
        • 2.Qxd2#
      • 1...Rxc3
        • 2.Bxc3#
      • 1...Se1
        • 2.Se3#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sf4
        • 2.Se3#
      • 1...Sh4
        • 2.Se3#

Anticipated by 21936(1922)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD::QAB1(E),XR(c)
  • Tries
    • Try
      • S(F);N_SPINB(B),XR(c)
      • Threat
        • QAB(E)+S(F),DCHECK
      • Vars
        • S(d);::QAB(E)+S(F),DCHECK,XS(d)
      • Refutation
        • R(a);P_PINB(B),P_SPINR(a),XS(F)
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • P(e);OGATE,XS(F)::QAB(E)
      • Refutation
        • R(a);
  • Actual
    • Q(E);N_PINR(c)
    • Threat
      • QAB(E)
    • Vars
      • R(c);CHECK,OGATE,P_SPINR(c),XB(B)::QAR1(E),XR(c)
      • R(c);N_PINB(B),XP(D)::QAR(E)+B(B),XR(c)
      • S(d);N_GUARD::S(A)
      • S(d);N_GUARD::S(A),XS(d)
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