MESON Chess Problem Database

Problem Display
PID: 214502 (n3b3/b4p2/Qpk2p2/2pR1P2/P2PpB2/8/2N2N2/4KB2 w - - 0 1)

Hawkins, Xenophon

Brownson's Chess Journal, 1877

n3b3/b4p2/Qpk2p2/2pR1P2/P2PpB2/8/2N2N2/4KB2

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb8
      • 2.Qxa8#
    • 1...Bd7
      • 2.Rxc5#
    • 1...Sc7
      • 2.Rd6#
    • 1...cxd4
      • 2.Sb4#
    • 1...c4
      • 2.Sb4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Bb5#
      • 1...Sc7
        • 2.Rd6#
      • 1...c4!
    • 1.Sxe4?
      • 1...cxd4
        • 2.Sb4#
      • 1...Bb8
        • 2.Qxa8#
      • 1...Bd7
        • 2.Rxc5#
      • 1...Sc7
        • 2.Rd6#
      • 1...c4
        • 2.Sb4#
      • 1...Kxd5!
    • 1.Bc4?
      • 1...cxd4
        • 2.Sb4#
        • 2.Sxd4#
      • 1...Bb8
        • 2.Qxa8#
      • 1...Bd7
        • 2.Rxc5#
      • 1...Sc7
        • 2.Rd6#
      • 1...e3!
    • 1.Qb5+?
      • 1...Kxd5
        • 2.Bc4#
      • 1...Kb7!
    • 1.Qc8+?
      • 1...Sc7
        • 2.Rd6#
      • 1...Kxd5!
    • 1.Qxa7?
      • threat
        • 2.Rd6#
        • 2.Qxa8#
      • 1...cxd4
        • 2.Sb4#
        • 2.Qxa8#
      • 1...Sc7
        • 2.Rd6#
      • 1...b5
        • 2.Rxc5#
        • 2.Rd6#
      • 1...Kxd5!
  • Keys
    • 1.Bg2!
      • 1...Kxd5
        • 2.Bxe4#
      • 1...cxd4
        • 2.Sb4#
      • 1...e3
        • 2.Rd8#
      • 1...Bb8
        • 2.Qxa8#
      • 1...Bd7
        • 2.Rxc5#
      • 1...Sc7
        • 2.Rd6#
      • 1...c4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE::QAB(J),XS(h)
    • B(i);SBLOCK::R1(H),XP(b)
    • S(h);SBLOCK::R1(H)
    • P(b);N_GUARD,XP(F)::S(C)
    • P(b);N_GUARD::S(C)
  • Tries
    • Try
      • S(C);
      • Threat
        • B(B)
      • Vars
        • S(h);SBLOCK::R1(H)
      • Refutation
        • P(b);
    • Try
      • S(D);XP(a)
      • Vars
        • P(b);N_GUARD,XP(F)::S(C)
        • B(f);OGATE::QAB(J),XS(h)
        • B(i);SBLOCK::R1(H),XP(b)
        • S(h);SBLOCK::R1(H)
        • P(b);N_GUARD::S(C)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT,XR(H)
    • Try
      • B(B);
      • Vars
        • B(f);OGATE::QAB(J),XS(h)
        • B(i);SBLOCK::R1(H),XP(b)
        • S(h);SBLOCK::R1(H)
      • Refutation
        • P(a);
    • Try
      • Q(J);CHECK,N_PINP(c)
      • Vars
        • K(d);P_SPINP(b),S_FLIGHT,XR(H)::B(B)
      • Refutation
        • K(d);P_SPINP(c),S_FLIGHT
    • Try
      • Q(J);CHECK,N_PINP(c)
      • Vars
        • S(h);P_SPINS(h)::R1(H)
      • Refutation
        • K(d);S_FLIGHT,XR(H)
    • Try
      • Q(J);N_PINP(c),XB(f)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);::R1(H)
      • Refutation
        • K(d);S_FLIGHT,XR(H)
  • Actual
    • B(B);
    • Vars
      • K(d);N_SPINP(c),OGATEB,P_SPINP(a),S_FLIGHT,XR(H)::B(B),XP(a)
      • P(b);N_GUARD,XP(F)::S(C)
      • P(a);OGATEB::B(B)+R(H)
      • B(f);OGATE::QAB(J),XS(h)
      • B(i);SBLOCK::R1(H),XP(b)
      • S(h);SBLOCK::R1(H)
      • P(b);N_GUARD::S(C)
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