MESON Chess Problem Database

Problem Display
PID: 10371 (5n2/K1p2B2/2P2ppQ/1RB2k1P/2P1N1N1/6pP/Pqp1R1Pb/8 w - - 0 1)

Mansfield, Comins

2nd HM., Zurcher Woche, 1963

5n2/K1p2B2/2P2ppQ/1RB2k1P/2P1N1N1/6pP/Pqp1R1Pb/8

#2

14 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bd4#
    • 1...Qc1
      • 2.Bg1#
      • 2.Bf2#
      • 2.Ba3#
      • 2.Bb4#
      • 2.Bd4#
      • 2.Bb6#
      • 2.Bd6#
      • 2.Be7#
      • 2.Bxf8#
    • 1...Qa3+
      • 2.Bxa3#
    • 1...Qc3
      • 2.Bd4#
    • 1...Qd4
      • 2.Bxd4#
    • 1...Qb1
      • 2.Bb4#
    • 1...Qxa2+
      • 2.Ba3#
    • 1...Qb3
      • 2.Bb4#
    • 1...Qb4
      • 2.Bxb4#
    • 1...Bg1
      • 2.Sxg3#
    • 1...Se6
      • 2.Bxg6#
  • Tries
    • 1.Be3+?
      • 1...Qe5
        • 2.Qf4#
      • 1...Qxb5
        • 2.Qf4#
      • 1...Kxe4!
    • 1.Bd6+?
      • 1...Qxb5
        • 2.Qf4#
      • 1...Qe5!
    • 1.Bxg6+?
      • 1...Ke6
        • 2.Sc3#
        • 2.Sg5#
      • 1...Sxg6!
    • 1.Rf2+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...gxf2!
    • 1.Qxg6+?
      • 1...Kf4
        • 2.Be3#
      • 1...Sxg6!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qf1#
      • 1...Qa3+
        • 2.Bxa3#
      • 1...Qxa2+
        • 2.Ba3#
      • 1...Qxc1
        • 2.Bd6#
      • 1...Qe5
        • 2.Sh6#
      • 1...Qa1
        • 2.Bd4#
      • 1...Qc3
        • 2.Bd4#
      • 1...Qd4
        • 2.Bxd4#
      • 1...Qb1
        • 2.Bb4#
      • 1...Qb3
        • 2.Bb4#
      • 1...Bg1
        • 2.Sxg3#
      • 1...Se6
        • 2.Bxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD,P_PINP(A)::R(H)+B(I)
    • Q(a);CHECK,N_GUARD::R(H)+B(I),XQ(a)
    • Q(a);N_GUARD::R(H)+B(I)
    • Q(a);N_GUARD,P_PINB(I)::R(H)+B(I),XQ(a)
    • Q(a);CHECK,N_GUARD,XP(A)::R(H)+B(I)
    • Q(a);N_GUARD::R(H)+B(I),XQ(a)
    • B(c);N_GUARD,P_PINB(I)::S(F),XP(d)
    • S(i);N_GUARD,SBLOCK::B(N),XP(g)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::QAR1(L)
        • Q(a);XR(H)::QAR1(L)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • B(I);CHECK
      • Vars
        • Q(a);XR(H)::QAR1(L)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • B(N);CHECK,XP(g)
      • Refutation
        • S(i);XB(N)
    • Try
      • R(B);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(F)::QAR1(L)
      • Refutation
        • P(d);XR(B)
    • Try
      • Q(L);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT::B(I)
      • Refutation
        • S(i);XQ(L)
  • Actual
    • Q(L);
    • Threat
      • QAR(L)
    • Vars
      • Q(a);CHECK,N_GUARD::R(H)+B(I),XQ(a)
      • Q(a);CHECK,N_GUARD,XP(A)::R(H)+B(I)
      • Q(a);N_GUARD,XQ(L)::R(H)+B(I)
      • Q(a);SBLOCK::S(G)
      • Q(a);N_GUARD,P_PINP(A)::R(H)+B(I)
      • Q(a);N_GUARD::R(H)+B(I)
      • Q(a);N_GUARD,P_PINB(I)::R(H)+B(I),XQ(a)
      • B(c);N_GUARD,P_PINB(I)::S(F),XP(d)
      • S(i);N_GUARD,SBLOCK::B(N),XP(g)
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