MESON Chess Problem Database

Problem Display
PID: 21470 (8/7p/Kp2Q3/2ppp3/R1nbk1N1/5rP1/1BP3n1/3N3B w - - 0 1)

Mansfield, Comins

Good Companions (December), 1919

8/7p/Kp2Q3/2ppp3/R1nbk1N1/5rP1/1BP3n1/3N3B

#2

9 + 10

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qxe5#
    • 1...Bf2
      • 2.Qxe5#
    • 1...Be3
      • 2.Qxe5#
    • 1...Se1
      • 2.Sf6#
    • 1...Sge3
      • 2.Sdf2#
      • 2.Sgf2#
      • 2.Sf6#
    • 1...Sf4
      • 2.Sf6#
    • 1...Sh4
      • 2.Sf6#
    • 1...Sxb2
      • 2.Qxe5#
    • 1...Sd2
      • 2.Qxe5#
    • 1...Sa3
      • 2.Qxe5#
    • 1...Sce3
      • 2.Sc3#
      • 2.Qxe5#
    • 1...Sa5
      • 2.Qxe5#
    • 1...Sd6
      • 2.Qxe5#
  • Tries
    • 1.Sdf2+?
      • 1...Bxf2
        • 2.Qxe5#
      • 1...Rxf2!
    • 1.Sde3?
      • threat
        • 2.Qxd5#
      • 1...Rxg3
        • 2.Qf5#
      • 1...Bxe3
        • 2.Qxe5#
      • 1...Sgxe3
        • 2.Sf2#
        • 2.Sf6#
      • 1...Scxe3
        • 2.Qxe5#
      • 1...Sf4
        • 2.Qf5#
      • 1...Rxe3!
    • 1.Sgf2+?
      • 1...Bxf2
        • 2.Qxe5#
      • 1...Rxf2!
    • 1.Qg6+?
      • 1...Rf5
        • 2.Bxg2#
      • 1...hxg6!
  • Keys
    • 1.Sge3!
      • threat
        • 2.Qxd5#
      • 1...Rxe3
        • 2.Qg4#
      • 1...Rxg3
        • 2.Qf5#
      • 1...Bxe3
        • 2.Qxe5#
      • 1...Sgxe3
        • 2.Sf2#
      • 1...Scxe3
        • 2.Sc3#
      • 1...Sf4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • B(d);N_GUARD,P_SPINS(c)::QAR1(I),XP(h)
    • S(a);P_SPINR(b)::S(G)
    • S(c);N_GUARD,P_SPINB(d),XB(C)::QAR1(I),XP(h)
    • S(c);N_GUARD,P_SPINB(d)::QAR1(I),XP(h)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • B(d);P_SPINS(c),XS(A)::QAR1(I),XP(h)
      • Refutation
        • R(b);P_SPINS(a),XS(A)
    • Try
      • S(A);
      • Threat
        • QAB1(I),XP(g)
      • Vars
        • R(b);N_GUARD,P_SPINS(a),XP(E)::QAB1(I)
        • B(d);N_GUARD,P_SPINS(c),XS(A)::QAR1(I),XP(h)
        • S(c);N_GUARD,P_SPINB(d),XS(A)::QAR1(I),XP(h)
        • S(a);P_SPINR(b)::QAB1(I)
      • Refutation
        • R(b);P_SPINS(a),XS(A)
    • Try
      • S(G);CHECK
      • Vars
        • B(d);P_SPINS(c),XS(G)::QAR1(I),XP(h)
      • Refutation
        • R(b);P_SPINS(a),XS(G)
    • Try
      • Q(I);CHECK,N_PINP(h)
      • Vars
        • R(b);P_SPINR(b),P_SPINS(a),S_CUTP(j)::B(B),XS(a)
      • Refutation
        • P(j);XQ(I)
  • Actual
    • S(G);
    • Threat
      • QAB1(I),XP(g)
    • Vars
      • R(b);N_GUARD,P_SPINS(a),XS(G)::QAR2(I)
      • R(b);N_GUARD,P_SPINS(a),XP(E)::QAB1(I)
      • B(d);N_GUARD,P_SPINS(c),XS(G)::QAR1(I),XP(h)
      • S(a);P_SPINR(b),SBLOCK,XS(G)::S(A)
      • S(c);P_SPINB(d),SBLOCK,XS(G)::S(A)
      • S(a);P_SPINR(b)::QAB1(I)
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