MESON Chess Problem Database

Problem Display
PID: 141622 (2R5/1N6/1R3p2/1p3p2/1k2qB1K/1P6/P4p1Q/1N6 w - - 0 1)

Myllyniemi, Matti Arvo

Helsingin Sanomat, 1956

2R5/1N6/1R3p2/1p3p2/1k2qB1K/1P6/P4p1Q/1N6

#2

9 + 6

5454 Near Snap 2011
56 The Problemist 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Bd6#
    • 1...Qh1
      • 2.Bd2#
      • 2.Bd6#
      • 2.Rc4#
    • 1...Qg2
      • 2.Bd2#
      • 2.Bd6#
      • 2.Rc4#
    • 1...Qf3
      • 2.Bd6#
      • 2.Rc4#
    • 1...Qxb7
      • 2.Bd2#
    • 1...Qe1
      • 2.Bd6#
      • 2.Rc4#
    • 1...Qe2
      • 2.Bd6#
    • 1...Qe3
      • 2.Rc4#
    • 1...Qc4
      • 2.Rxc4#
    • 1...Qxf4+
      • 2.Qxf4#
    • 1...Qe5
      • 2.Rc4#
    • 1...Qe6
      • 2.Bd2#
    • 1...Qe7
      • 2.Bd2#
      • 2.Rc4#
    • 1...Qe8
      • 2.Bd2#
      • 2.Bd6#
      • 2.Rc4#
    • 1...f1Q
      • 2.Qd2#
    • 1...f1B
      • 2.Qd2#
    • 1...f1R
      • 2.Qd2#
  • Keys
    • 1.Ra8!
      • threat
        • 2.Ra4#
      • 1...Qxf4+
        • 2.Qxf4#
      • 1...Qxb1
        • 2.Bd2#
      • 1...Qxb7
        • 2.Bd6#

This anticipates 22176(1960)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_PINB(E),XS(A)::B(E)
    • Q(c);N_PINB(E),XS(H)::B(E)
    • Q(c);N_PINB(E)::B(E)
    • Q(c);N_GUARD,N_PINB(E)::R1(I)
    • Q(c);N_GUARD::R1(I),XQ(c)
    • Q(c);CHECK,OGATE,XB(E)::QAR(C),XQ(c)
    • P(a);OGATE::QAB(C)
  • Actual
    • R(I);
    • Threat
      • R1(I)
    • Vars
      • Q(c);CHECK,OGATE,XB(E)::QAR(C),XQ(c)
      • Q(c);N_PINB(E),XS(A)::B(E)
      • Q(c);N_PINB(E),XS(H)::B(E)
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