MESON Chess Problem Database

Problem Display
PID: 208721 (3K4/1b6/6p1/6R1/2n1pk1P/7R/2Np1p2/2Q5 w - - 0 1)

Wester, Anders Emil

Land og Folk, 1971

3K4/1b6/6p1/6R1/2n1pk1P/7R/2Np1p2/2Q5

#2

6 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...f1Q
      • 2.Qxf1#
    • 1...f1S
      • 2.Qxf1#
    • 1...f1B
      • 2.Qxf1#
    • 1...f1R
      • 2.Qxf1#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Se2#
        • 2.Se6#
      • 1...dxc1S
        • 2.Se6#
      • 1...f1Q
        • 2.Se6#
        • 2.Qxf1#
      • 1...f1B
        • 2.Se6#
        • 2.Qxf1#
      • 1...Bd5
        • 2.Se2#
      • 1...Bc8
        • 2.Se2#
      • 1...e3!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sg2#
      • 1...d1Q+
        • 2.Sd5#
      • 1...d1R+
        • 2.Sd5#
      • 1...Sxe3
        • 2.Qc7#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(b);OGATEB::QAR(A),XQ(b)
    • P(b);OGATEB::QAR(A),XS(b)
    • P(b);OGATEB::QAR(A),XB(b)
    • P(b);OGATEB::QAR(A),XR(b)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);N_SPINP(a),XQ(A)::S(B)
        • B(g);::S(B)
      • Refutation
        • P(d);N_SPINP(a)
  • Actual
    • S(B);N_PINP(a)
    • Threat
      • S(B)
    • Vars
      • P(a);CHECK::QAB(A)+S(B),DCHECK
      • S(c);OGATE,XS(B)::QAB(A)
      • P(b);OGATEB::QAR(A),XQ(b)
      • P(b);OGATEB::QAR(A),XB(b)
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