MESON Chess Problem Database

Problem Display
PID: 255990 (1nr5/3p1b2/pR4N1/5Q1p/P1k4q/2p3br/n1N1P1Pp/7K w - - 0 1)

Andrade, Barry Jack da Costa

Stubbs, Arthur Goodwin

British Chess Magazine, 1933

1nr5/3p1b2/pR4N1/5Q1p/P1k4q/2p3br/n1N1P1Pp/7K

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sa3#
    • 1...Rc5
      • 2.Qd3#
    • 1...Sc1
      • 2.Rb4#
    • 1...Sb4
      • 2.Rxb4#
    • 1...a5
      • 2.Qb5#
  • Keys
    • 1.Rb5!
      • threat
        • 2.Qd3#
      • 1...Bxg6
        • 2.Qd5#
      • 1...axb5
        • 2.Qxb5#
      • 1...Sb4
        • 2.Rxb4#
      • 1...Qd4
        • 2.Sa3#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Be1
        • 2.Se5#
      • 1...Bf2
        • 2.Se5#
      • 1...Bf4
        • 2.Qe4#
      • 1...Be5
        • 2.Sxe5#
      • 1...Bd6
        • 2.Qxf7#
      • 1...Bc7
        • 2.Qc5#
      • 1...Sc1
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • Q(g);SBLOCK::S(B)
    • R(m);SBLOCK::QAB1(F)
    • S(a);N_GUARD::R1(G)
    • S(a);N_GUARD::R1(G),XS(a)
    • P(i);N_GUARD::QAB1(F)
  • Actual
    • R(G);
    • Threat
      • QAB1(F)
    • Vars
      • B(k);N_GUARD,XS(H)::QAB1(F)
      • P(i);OGATE,XR(G)::QAB1(F),XP(i)
      • S(a);N_GUARD::R1(G),XS(a)
      • Q(g);SBLOCK::S(B)
      • Q(g);N_GUARD,P_PINP(D)::QAR2(F),XQ(g)
      • B(d);N_GUARD::S(H)
      • B(d);S_CUTQ(g)::QAR2(F)
      • B(d);N_GUARD::S(H),XB(d)
      • B(d);S_CUTP(j)::QAB(F),XB(k)
      • B(d);S_CUTR(m)::QAR1(F)
      • S(a);N_GUARD::R1(G)
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Developed and maintained by Brian Stephenson.
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