MESON Chess Problem Database

Problem Display
PID: 21206 (7K/1Q1p4/1NpP4/5P1R/1p1NkB1R/1rr1P3/1bP3P1/1B6 w - - 0 1)

Mansfield, Comins

2nd HM., Good Companions (November), 1917

7K/1Q1p4/1NpP4/5P1R/1p1NkB1R/1rr1P3/1bP3P1/1B6

#2

13 + 7

3132 The Good Companion Two-Mover 1922
3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Bh2#
      • 2.Bg3#
    • 1...Rc4
      • 2.c3#
    • 1...Rc5
      • 2.c3#
  • Tries
    • 1.Rh7?
      • threat
        • 2.Re7#
      • 1...Rxe3
        • 2.Bh2#
        • 2.Bg3#
      • 1...Rc5
        • 2.c3#
      • 1...Rxc2!
    • 1.Qxc6+?
      • 1...Rxc6
        • 2.c3#
      • 1...dxc6!
    • 1.Qa8?
      • threat
        • 2.Qe8#
      • 1...Rxe3
        • 2.Bh2#
        • 2.Bg3#
      • 1...Rc5
        • 2.c3#
      • 1...Rxc2!
    • 1.Qc8?
      • threat
        • 2.Qe8#
      • 1...Rxe3
        • 2.Bh2#
        • 2.Bg3#
      • 1...Rc5
        • 2.c3#
      • 1...Rxc2!
    • 1.Qxd7?
      • threat
        • 2.Qe6#
        • 2.Qe8#
        • 2.Qe7#
      • 1...Rxe3
        • 2.Bh2#
        • 2.Bg3#
      • 1...Rc5
        • 2.c3#
      • 1...Rxc2!
    • 1.Qb8?
      • threat
        • 2.Qe8#
      • 1...Rxe3
        • 2.Bh2#
        • 2.Bg3#
      • 1...Rc5
        • 2.c3#
      • 1...Rxc2!
    • 1.cxb3+?
      • 1...Rc2
        • 2.Bxc2#
      • 1...Rd3!
    • 1.f6?
      • threat
        • 2.Bh6#
        • 2.Re5#
      • 1...Rxe3
        • 2.Bh2#
        • 2.Bg3#
        • 2.Be5#
        • 2.Bh6#
      • 1...Rc5
        • 2.Bh6#
        • 2.c3#
      • 1...Rxc2!
  • Keys
    • 1.Sxc6!
      • threat
        • 2.Bh6#
      • 1...Rxc2+
        • 2.Se5#
      • 1...Rd3+
        • 2.Sd4#
      • 1...Rxe3+
        • 2.Be5#
      • 1...Rc4+
        • 2.c3#
      • 1...Rc5+
        • 2.c3#
      • 1...Rxc6+
        • 2.c3#
      • 1...dxc6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,P_PINS(E)::B(A)+P(B)
  • Tries
    • Try
      • R(I);
      • Threat
        • R(I)
      • Vars
        • R(c);OGATE,P_PINS(E)::B(A)+P(B)
      • Refutation
        • R(c);P_PINS(E),P_SPINR(c),XP(B)
    • Try
      • Q(L);CHECK,XP(f)
      • Vars
        • R(c);OGATE,P_PINS(E),XQ(L)::B(A)+P(B)
      • Refutation
        • P(g);XQ(L)
    • Try
      • Q(L);
      • Threat
        • QAR(L)
      • Vars
        • R(c);OGATE,P_PINS(E)::B(A)+P(B)
      • Refutation
        • R(c);P_PINS(E),P_SPINR(c),XP(B)
    • Try
      • Q(L);N_PINP(f)
      • Threat
        • QAR(L)
      • Vars
        • R(c);OGATE,P_PINS(E)::B(A)+P(B)
      • Refutation
        • R(c);P_PINS(E),P_SPINR(c),XP(B)
    • Try
      • Q(L);N_PINP(f),XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • R(c);OGATE,P_PINS(E)::B(A)+P(B)
      • Refutation
        • R(c);P_PINS(E),P_SPINR(c),XP(B)
    • Try
      • Q(L);N_PINP(f)
      • Threat
        • QAR(L)
      • Vars
        • R(c);OGATE,P_PINS(E)::B(A)+P(B)
      • Refutation
        • R(c);P_PINS(E),P_SPINR(c),XP(B)
    • Try
      • P(B);CHECK,XR(b)
      • Vars
        • R(c);N_GUARD,P_PINS(E),P_SPINR(c)::B(A),XR(c)
      • Refutation
        • R(c);P_PINS(E),P_SPINR(c)
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Refutation
        • R(c);P_SPINR(c),XP(B)
  • Actual
    • S(E);XP(f)
    • Threat
      • R(G)+B(F)
    • Vars
      • R(c);CHECK,N_GUARD,P_SPINR(c),XP(B)::QAB(L)+S(E)
      • R(c);CHECK,N_GUARD::QAB(L)+S(E)
      • R(c);CHECK,SBLOCK,XP(D)::R(G)+B(F)
      • R(c);CHECK,OGATE::B(A)+P(B)
      • R(c);CHECK,OGATE,P_SPINR(c),XS(E)::B(A)+P(B)
      • P(g);OGATE,P_SPINP(g),XS(E)::QAR(L)
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