MESON Chess Problem Database

Problem Display
PID: 2177 (2Q5/bpP5/1k1P4/1P6/1K3n1r/1pNp4/r2P4/8 w - - 0 1)

Cheney, George Nelson

Source?, 0000

2Q5/bpP5/1k1P4/1P6/1K3n1r/1pNp4/r2P4/8

#2

7 + 8

1679 American Chess Nuts 1868
5656 Sammlung Leichterer Schachaufgaben I (Dufresne) 1881

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Sa4#
    • 1...Rc2
      • 2.Sa4#
    • 1...Rxd2
      • 2.Sa4#
    • 1...Ra4+
      • 2.Sxa4#
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qg1#
        • 2.c8S#
      • 1...Ra4+
        • 2.Sxa4#
      • 1...Sd5+
        • 2.Sxd5#
      • 1...Rxd2
        • 2.Sa4#
        • 2.c8S#
      • 1...Rxg4
        • 2.c8S#
      • 1...Ra1
        • 2.c8S#
      • 1...Rh1
        • 2.c8S#
      • 1...Rh2
        • 2.c8S#
      • 1...Rh3
        • 2.c8S#
      • 1...Rh5
        • 2.c8S#
      • 1...Rh8
        • 2.Qg1#
      • 1...Se2
        • 2.Sd5#
        • 2.c8S#
      • 1...Sg2
        • 2.Sd5#
        • 2.c8S#
      • 1...Sh3
        • 2.Sd5#
        • 2.c8S#
      • 1...Sh5
        • 2.Sd5#
        • 2.c8S#
      • 1...Se6
        • 2.Sd5#
        • 2.c8S#
      • 1...Sg6
        • 2.Sd5#
        • 2.c8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::S(B)
    • R(a);N_GUARD,XP(A)::S(B)
    • R(a);CHECK,N_GUARD::S(B),XR(a)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);CHECK,N_GUARD::S(B),XR(a)
      • S(d);CHECK,N_GUARD,P_PINQ(G)::S(B),XS(d)
      • R(e);XQ(G)::P=S
      • R(a);::P=S
      • R(e);::P=S
      • R(e);::QAB(G)
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