MESON Chess Problem Database

Problem Display
PID: 234734 (k2r1N2/p1Q3PK/8/8/8/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2013

k2r1N2/p1Q3PK/8/8/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qc8#
    • 1...Rd2
      • 2.Qc8#
    • 1...Rd3
      • 2.Qc8#
    • 1...Rd4
      • 2.Qc8#
    • 1...Rd5
      • 2.Qc8#
    • 1...Rd6
      • 2.Qc8#
    • 1...Rd7
      • 2.Qc8#
    • 1...Rc8
      • 2.Qxc8#
    • 1...Rxf8
      • 2.gxf8Q#
      • 2.gxf8R#
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qc6#
      • 1...Rh8+
        • 2.gxh8Q#
        • 2.gxh8R#
      • 1...Rxd7
        • 2.Qc8#
      • 1...Rb8
        • 2.Qxb8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...a5
        • 2.Sb6#
      • 1...a6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD::QAR2(A)
    • R(c);N_GUARD,P_PINP(B)::QAR2(A)
    • R(c);N_GUARD::QAR2(A),XR(c)
    • R(c);OGATE,XS(D)::PXR(c)=Q
  • Actual
    • S(D);
    • Threat
      • QAB(A)
    • Vars
      • R(c);CHECK,OGATE::PXR(c)=Q
      • R(c);N_GUARD,P_PINP(B),XS(D)::QAR2(A)
      • R(c);N_GUARD::QAR1(A),XR(c)
      • R(c);N_GUARD::QAR2(A),XR(c)
      • P(a);N_GUARD::S(D)
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