MESON Chess Problem Database

Problem Display
PID: 109052 (1bB1q1r1/1n1R4/3r1Q2/n4N2/1N2k1pR/5pB1/3p1P2/3K4 w - - 0 1)

Narroway, Edward

Saturday Night, 1956

1bB1q1r1/1n1R4/3r1Q2/n4N2/1N2k1pR/5pB1/3p1P2/3K4

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Qe5#
    • 1...Qg6
      • 2.Qe5#
    • 1...Qxd7
      • 2.Qe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qxc8
      • 2.Qe5#
    • 1...Qd8
      • 2.Qe5#
    • 1...Qf8
      • 2.Qe5#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Ra6
      • 2.Rd4#
    • 1...Rb6
      • 2.Rd4#
    • 1...Rc6
      • 2.Rd4#
    • 1...Re6
      • 2.Rd4#
    • 1...Rxf6
      • 2.Rd4#
    • 1...Rf8
      • 2.Rxg4#
    • 1...Rh8
      • 2.Rxg4#
  • Tries
    • 1.Sxd6+?
      • 1...Sxd6
        • 2.Qf4#
      • 1...Bxd6!
    • 1.Bxd6?
      • threat
        • 2.Sg3#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Bxd6!
    • 1.Qd4+?
      • 1...Rxd4
        • 2.Rxd4#
      • 1...Kxf5!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Sg3#
      • 1...Kxf4
        • 2.Sxd6#
      • 1...Rxf6
        • 2.Rd4#
      • 1...Qe5
        • 2.Qxe5#
      • 1...g3
        • 2.Bg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 14
  • Sets
    • Q(i);N_GUARD::QAR1(G)
    • Q(i);N_GUARD,XR(H)::QAR1(G)
    • Q(i);N_GUARD::QAR1(G),XQ(i)
    • Q(i);N_GUARD,XB(I)::QAR1(G)
    • R(f);OGATE::R1(H),XR(f)
    • R(f);OGATE::R1(H)
    • R(f);OGATE,XQ(G)::R1(H)
    • R(j);N_GUARD::R(E),XP(d)
  • Tries
    • Try
      • S(F);CHECK,XR(f)
      • Vars
        • S(g);XS(F)::QAR1(G)
      • Refutation
        • B(h);XS(F)
    • Try
      • B(C);XR(f)
      • Threat
        • S(F)
      • Vars
        • Q(i);N_GUARD::QAR1(G),XQ(i)
      • Refutation
        • B(h);XB(C)
    • Try
      • Q(G);CHECK
      • Vars
        • R(f);OGATE,XQ(G)::R1(H),XR(f)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT,XS(F)
  • Actual
    • B(C);N_PINP(d)
    • Threat
      • S(F)
    • Vars
      • K(c);P-FLIGHT,P_SPINP(d),XB(C)::QAR(G)+S(F),XR(f)
      • R(f);OGATE,XQ(G)::R1(H)
      • Q(i);N_GUARD::QAR1(G),XQ(i)
      • P(d);OGATEB::R(E)+B(C)
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