MESON Chess Problem Database

Problem Display
PID: 16510 (8/2Rrbr2/1P1p4/qN1k2nN/p7/2p5/b2pRB2/nB1Q3K w - - 0 1)

Fillery, William Edmund Frank

Chess, 1941

8/2Rrbr2/1P1p4/qN1k2nN/p7/2p5/b2pRB2/nB1Q3K

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb6
      • 2.Sxc3#
    • 1...Qa6
      • 2.Sxc3#
    • 1...Qa7
      • 2.Sxc3#
    • 1...Qa8
      • 2.Sxc3#
    • 1...Rf4
      • 2.Sxf4#
    • 1...Rg7
      • 2.Sf4#
    • 1...Bf6
      • 2.Sf4#
    • 1...Sc2
      • 2.Bxa2#
  • Keys
    • 1.Qxa4!
      • threat
        • 2.Qd4#
      • 1...d1Q+
        • 2.Qxd1#
      • 1...d1R+
        • 2.Qxd1#
      • 1...Qxb6
        • 2.Sxc3#
      • 1...Qxa4
        • 2.Sxc3#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...Se4
        • 2.Qxe4#
      • 1...Qb4
        • 2.Qa8#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bf6
        • 2.Sf4#
      • 1...Sc2
        • 2.Bxa2#
      • 1...Sb3
        • 2.Qc4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Se6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_GUARD,XP(H)::S(F),XP(d)
    • Q(f);N_GUARD::S(F),XP(d)
    • R(l);N_GUARD::S(G),XR(l)
    • R(l);N_GUARD::S(G)
    • B(k);S_CUTR(l)::S(G)
    • S(a);N_GUARD::B(A),XB(b)
  • Actual
    • Q(B);N_PINP(c),XP(e)
    • Threat
      • QAR1(B)
    • Vars
      • P(c);CHECK,OGATEB::QAR(B),XQ(c)
      • P(c);CHECK,OGATEB::QAR(B),XR(c)
      • Q(f);N_GUARD,XP(H)::S(F),XP(d)
      • Q(f);N_GUARD,XQ(B)::S(F),XP(d)
      • R(j);XR(I)::S(F),XR(j)
      • S(h);N_GUARD::QAB1(B),XS(h)
      • Q(f);OGATE::QAB(B)
      • R(l);N_GUARD::S(G),XR(l)
      • B(b);N_GUARD::QAB1(B),XB(b)
      • B(k);S_CUTR(l)::S(G)
      • S(a);N_GUARD::B(A),XB(b)
      • S(a);S_CUTB(b)::QAB1(B)
      • S(h);N_GUARD::QAB1(B)
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