MESON Chess Problem Database

Problem Display
PID: 5030 (1Q6/p2p1n2/P5p1/3NR3/3k1p2/1p1p1P2/3n3N/K1R1B1b1 w - - 0 1)

Blake, Percy Francis

Leeds Mercury, 1897

1Q6/p2p1n2/P5p1/3NR3/3k1p2/1p1p1P2/3n3N/K1R1B1b1

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Bxf2#
    • 1...Bxh2
      • 2.Bf2#
    • 1...Sxf3
      • 2.Sxf3#
    • 1...b2+
      • 2.Qxb2#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Qxa7#
      • 1...b2+
        • 2.Qxb2#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Se4
        • 2.Qb4#
      • 1...Sc4!
    • 1.Rc4+?
      • 1...Kxc4
        • 2.Qb4#
      • 1...Sxc4!
    • 1.Qc7?
      • threat
        • 2.Qc3#
      • 1...Sxe5
        • 2.Qc5#
      • 1...Sb1
        • 2.Rc4#
      • 1...Sc4
        • 2.Bc3#
        • 2.Rxc4#
      • 1...Se4
        • 2.Rc4#
      • 1...b2+!
    • 1.Qb4+?
      • 1...Sc4
        • 2.Bc3#
      • 1...Kxe5!
  • Keys
    • 1.Se7!
      • 1...b2+
        • 2.Qxb2#
      • 1...Bxh2
        • 2.Bf2#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...Sxe5
        • 2.Qxa7#
      • 1...Se4
        • 2.Rxe4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6
        • 2.Sc6#
      • 1...g5
        • 2.Sf5#
      • 1...Bf2
        • 2.Bxf2#
      • 1...Be3
        • 2.Rd5#
      • 1...Sb1
        • 2.Re4#
      • 1...Sf1
        • 2.Re4#
      • 1...Sc4
        • 2.Bc3#
      • 1...Sg5
        • 2.Qd6#
      • 1...Sh6
        • 2.Qd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...Sh8
        • 2.Qd6#
      • 1...d5
        • 2.Sc6#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::B(C),XB(a)
    • B(a);N_GUARD,XS(D)::B(C)
    • S(b);XP(E)::S(D),XS(b)
    • P(c);CHECK,OGATE::QAB(I),XP(c)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB(I),XP(h)
      • Vars
        • P(c);CHECK,OGATE::QAB(I),XP(c)
        • S(j);OGATE,XR(G)::QAB1(I),XS(j)
        • S(b);N_GUARD::QAR2(I)
      • Refutation
        • S(b);
    • Try
      • R(B);CHECK
      • Vars
        • K(e);P-FLIGHT,XR(B)::QAR1(I)
      • Refutation
        • S(b);XR(B)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • S(j);SBLOCK,XR(G)::QAB1(I)
        • S(b);N_GUARD::R1(B)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(I);CHECK
      • Vars
        • S(b);OGATE,P_SPINS(b)::B(C)
      • Refutation
        • K(e);S_FLIGHT,XR(G)
  • Actual
    • S(F);
    • Vars
      • P(c);CHECK,OGATE::QAB(I),XP(c)
      • B(a);N_GUARD,XS(D)::B(C)
      • S(b);XP(E)::S(D),XS(b)
      • S(j);SBLOCK,XR(G)::QAB(I),XP(h)
      • S(b);N_GUARD::R1(G),XS(b)
      • S(j);N_GUARD::QAR2(I),XS(j)
      • P(i);N_GUARD::S(F)
      • P(g);N_GUARD::S(F)
      • B(a);N_GUARD::B(C),XB(a)
      • B(a);SBLOCK::R1(G)
      • S(b);N_GUARD::R1(G)
      • S(b);OGATE,SBLOCK::B(C)
      • S(j);N_GUARD::QAR2(I)
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