MESON Chess Problem Database

Problem Display
PID: 267799 (r2RK3/P1kPP3/q2p4/3p4/1R1N4/pbN5/2p5/8 w - - 0 1)

Funk, Jacob E

The Problemist, 1955

r2RK3/P1kPP3/q2p4/3p4/1R1N4/pbN5/2p5/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Se6#
    • 1...Rb8
      • 2.axb8Q#
      • 2.axb8B#
    • 1...Rxd8+
      • 2.exd8Q#
      • 2.exd8B#
    • 1...Ba4
      • 2.Sxd5#
  • Keys
    • 1.Rdb8!
      • threat
        • 2.d8Q#
        • 2.d8B#
      • 1...Qc8+
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Rxb8+
        • 2.axb8Q#
        • 2.axb8B#
      • 1...Qxa7
        • 2.d8Q#
        • 2.d8B#
      • 1...Rxa7
        • 2.d8Q#
        • 2.d8B#
      • 1...c1Q
        • 2.d8Q#
        • 2.d8B#
      • 1...c1S
        • 2.d8Q#
        • 2.d8B#
      • 1...c1B
        • 2.d8Q#
        • 2.d8B#
      • 1...c1R
        • 2.d8Q#
        • 2.d8B#
      • 1...Qf1
        • 2.Rb7#
        • 2.d8Q#
        • 2.d8B#
      • 1...Qe2
        • 2.Rb7#
        • 2.d8Q#
        • 2.d8B#
      • 1...Qd3
        • 2.Rb7#
        • 2.d8Q#
        • 2.d8B#
      • 1...Qc4
        • 2.Rb7#
        • 2.d8Q#
        • 2.d8B#
      • 1...Qb5
        • 2.Scxb5#
      • 1...Qb7
        • 2.Rxb7#
        • 2.d8Q#
        • 2.d8B#
      • 1...Qa4
        • 2.Rb7#
      • 1...Qa5
        • 2.Rb7#
        • 2.d8Q#
        • 2.d8B#
      • 1...Qb6
        • 2.d8Q#
        • 2.d8B#
      • 1...Qc6
        • 2.Se6#
      • 1...Ba2
        • 2.d8Q#
        • 2.d8B#
      • 1...Ba4
        • 2.Sxd5#
      • 1...Bc4
        • 2.d8Q#
        • 2.d8B#
      • 1...a2
        • 2.d8Q#
        • 2.d8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(e);P_PINP(E),SBLOCK::S(C)
    • R(h);OGATE::PXR(h)=Q
    • R(h);CHECK,OGATE,XR(G)::PXR(h)=Q
    • B(c);N_GUARD,P_PINP(E)::S(A),XP(d)
  • Actual
    • R(G);
    • Threat
      • P=Q
    • Vars
      • Q(e);CHECK,N_PINR(G),OGATE::PXQ(e)=Q
      • R(h);CHECK,OGATE,XR(G)::PXR(h)=Q
      • Q(e);XP(D)::P=Q
      • R(h);N_PINR(G),XP(D)::P=Q
      • P(a);::P=Q
      • Q(e);N_GUARD,P_PINP(E)::S(A),XQ(e)
      • Q(e);N_GUARD,P_PINP(E)::R1(B)
      • Q(e);::P=Q
      • Q(e);P_PINP(E),SBLOCK::S(C)
      • B(c);::P=Q
      • B(c);N_GUARD,P_PINP(E)::S(A),XP(d)
      • P(b);::P=Q
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