MESON Chess Problem Database

Problem Display
PID: 51354 (2R1Q3/3N4/8/8/3p4/n2k1b2/R2Np3/1n2B1K1 w - - 0 1)

Andrade, Barry Jack da Costa

Manchester Guardian, 1958

2R1Q3/3N4/8/8/3p4/n2k1b2/R2Np3/1n2B1K1

#2

7 + 6

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qxe4#
    • 1...Bg4
      • 2.Qe4#
    • 1...Bh5
      • 2.Qe4#
    • 1...Sxd2
      • 2.Rxd2#
    • 1...Sc3
      • 2.Sc5#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Sc1#
      • 1...Bc6
        • 2.Qxe2#
      • 1...Be4!
    • 1.Sxf3?
      • threat
        • 2.Qxe2#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sc2!
    • 1.Rc1?
      • threat
        • 2.Sc5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sc2!
    • 1.Rcc2?
      • threat
        • 2.Sc5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sxc2!
    • 1.Qg6+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Ke3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb2#
      • 1...Sxc4
        • 2.Sc5#
      • 1...Bc6
        • 2.Qxe2#
      • 1...Be4
        • 2.Sde5#
      • 1...Sc3
        • 2.Rd2#

Anticipated by 24461(1955)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(e);N_GUARD::QAB1(G),XB(e)
    • B(e);N_GUARD::QAB1(G)
    • S(a);OGATE,XS(D)::R1(C),XS(a)
    • S(a);SBLOCK::S(E)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • B(e);N_GUARD::QAB1(G),XP(b)
      • Refutation
        • B(e);
    • Try
      • S(D);XB(e)
      • Threat
        • QAB1(G),XP(b)
      • Vars
        • S(a);N_GUARD::R1(C),XS(a)
        • S(a);N_GUARD::R1(C)
      • Refutation
        • S(c);
    • Try
      • R(F);
      • Threat
        • S(E)
      • Vars
        • B(e);N_GUARD::QAB1(G),XB(e)
      • Refutation
        • S(c);
    • Try
      • R(F);
      • Threat
        • S(E)
      • Vars
        • B(e);N_GUARD::QAB1(G),XB(e)
      • Refutation
        • S(c);XR(F)
    • Try
      • Q(G);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(c);SBLOCK,XS(D)::S(E)
      • B(e);N_GUARD::QAB1(G),XP(b)
      • B(e);SBLOCK::S(E)
      • S(a);N_GUARD,SBLOCK::R1(C)
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