MESON Chess Problem Database

Problem Display
PID: 21494 (2n1b1rb/Q2pr1BB/4q2n/1p6/3Pp2R/3Nk2p/2P1N1P1/4K3 w - - 0 1)

Rothstein, Louis

3rd HM., Good Companions (December), 1919

2n1b1rb/Q2pr1BB/4q2n/1p6/3Pp2R/3Nk2p/2P1N1P1/4K3

#2

10 + 12

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rxh3#
    • 1...Qb3
      • 2.Rxh3#
    • 1...Qc4
      • 2.Rxh3#
    • 1...Qd5
      • 2.Rxh3#
    • 1...Qa6
      • 2.Rxh3#
    • 1...Qb6
      • 2.Rxh3#
    • 1...Qc6
      • 2.Rxh3#
    • 1...Bg6
      • 2.Bxh6#
    • 1...Sg4
      • 2.Rxh3#
    • 1...Sd6
      • 2.d5#
  • Tries
    • 1.Bxh6+?
      • 1...Rg5
        • 2.Bxg5#
      • 1...Qxh6!
    • 1.Qa3?
      • threat
        • 2.Qc1#
      • 1...exd3
        • 2.Qxd3#
      • 1...hxg2!
    • 1.Qa5?
      • threat
        • 2.Qd2#
      • 1...b4
        • 2.Qg5#
      • 1...hxg2!
  • Keys
    • 1.Se5!
      • threat
        • 2.Rxe4#
      • 1...Qxe5
        • 2.Qa3#
      • 1...Qg4
        • 2.Qa3#
      • 1...Qd5
        • 2.Rxh3#
      • 1...Qf5
        • 2.Qa3#
      • 1...Qc6
        • 2.Rxh3#
      • 1...Qg6
        • 2.Qa3#
      • 1...Bg6
        • 2.Bxh6#
      • 1...Sg4
        • 2.Rxh3#
      • 1...Sf5
        • 2.Sg4#
      • 1...Sd6
        • 2.d5#
      • 1...d5
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD::R(G),XP(b)
    • B(j);S_CUTQ(e),S_CUTR(k)::B(I),XS(f)
    • S(f);S_CUTQ(e)::R(G),XP(b)
    • S(i);N_GUARD,S_CUTQ(e)::QAB(H)+P(F)
  • Tries
    • Try
      • B(I);CHECK,XS(f)
      • Vars
        • R(k);N_GUARD,P_SPINR(k)::B(I),XR(k)
      • Refutation
        • Q(e);XB(I)
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • P(c);OGATE,P_SPINP(c),XS(E)::QAR1(H),XP(c)
      • Refutation
        • P(b);XP(D)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • P(d);OGATE::QAB(H)
      • Refutation
        • P(b);XP(D)
  • Actual
    • S(E);
    • Threat
      • R1(G),XP(c)
    • Vars
      • Q(e);N_GUARD,XS(E)::QAR(H)
      • Q(e);N_GUARD::QAR(H)
      • Q(e);N_GUARD::R(G),XP(b)
      • B(j);S_CUTQ(e),S_CUTR(k)::B(I),XS(f)
      • S(f);S_CUTQ(e)::R(G),XP(b)
      • S(f);N_GUARD,S_CUTQ(e)::S(E)
      • S(i);N_GUARD,S_CUTQ(e)::QAB(H)+P(F)
      • P(g);S_CUTQ(e)::QAR(H)
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