MESON Chess Problem Database

Problem Display
PID: 20954 (8/3N2p1/2rR3B/1n5b/Q1n1k2N/pP2P3/2Kb4/1B2R3 w - - 0 1)

Mansfield, Comins

Hampstead and Highgate Express, 1914

8/3N2p1/2rR3B/1n5b/Q1n1k2N/pP2P3/2Kb4/1B2R3

#2

10 + 8

3202 Complete Mansfield/I 1996
133 The Problemist Supplement 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Kxc1#
    • 1...Bxe1
      • 2.Kc1#
    • 1...Bc3
      • 2.Kc1#
    • 1...Bxe3
      • 2.Rxe3#
    • 1...Bb4
      • 2.Kc1#
    • 1...Ba5
      • 2.Kc1#
    • 1...Bd1+
      • 2.Kxd1#
    • 1...Bg6
      • 2.Kd1#
    • 1...Bf7
      • 2.Kd1#
    • 1...Be8
      • 2.Kd1#
    • 1...Sc3
      • 2.Rd4#
    • 1...Sd4+
      • 2.Rxd4#
    • 1...Sxd6
      • 2.Qxc6#
    • 1...Sa7
      • 2.Rd4#
    • 1...Sc7
      • 2.Rd4#
  • Tries
    • 1.Sc5+?
      • 1...Ke5
        • 2.Bf4#
      • 1...Rxc5!
    • 1.Sf6+?
      • 1...Ke5
        • 2.Bf4#
      • 1...gxf6!
    • 1.Qxc4+?
      • 1...Sd4+
        • 2.Kxd2#
        • 2.Rxd4#
      • 1...Rxc4+!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qxc6#
      • 1...Bd1+
        • 2.Kxd1#
      • 1...Sxe3+
        • 2.Kxd2#
      • 1...Sa5+
        • 2.Kxd2#
      • 1...Se5+
        • 2.Sc5#
      • 1...Sb6+
        • 2.Kxd2#
      • 1...Sd4+
        • 2.Rxd4#
      • 1...Bf7
        • 2.Kd1#
      • 1...Sc3
        • 2.Rd4#
      • 1...Sa7
        • 2.Rd4#
      • 1...Sc7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • B(a);::B(A)+K(C),XB(a)
    • B(a);XR(B)::B(A)+K(C)
    • B(a);::B(A)+K(C)
    • B(a);OGATE,P_SPINB(a),XP(E)::R1(B),XB(a)
    • B(a);N_SPINS(c)::B(A)+K(C)
    • B(f);CHECK::B(A)+K(C),XB(f)
    • B(f);::B(A)+K(C)
    • S(e);N_GUARD::R1(H)
    • S(e);CHECK,N_GUARD,N_SPINS(c)::R1(H),XS(e)
    • S(e);OGATE,XR(H)::QAB(F),XR(g)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(d);N_SPINS(c),P-FLIGHT::B(I)
      • Refutation
        • R(g);XS(J)
    • Try
      • S(J);CHECK
      • Vars
        • K(d);N_SPINS(c),P-FLIGHT::B(I)
      • Refutation
        • P(h);XS(J)
    • Try
      • Q(F);CHECK,P_SPINQ(F),XS(c)
      • Refutation
        • R(g);CHECK,XQ(F)
  • Actual
    • Q(F);N_PINS(c),P_PINR(g)
    • Threat
      • QAB(F),XR(g)
    • Vars
      • B(f);CHECK::B(A)+K(C),XB(f)
      • S(c);CHECK,P_SPINS(c),XP(E)::B(A)+K(C),XB(a)
      • S(c);CHECK::B(A)+K(C),XB(a)
      • S(c);CHECK,SBLOCK::S(J)
      • S(e);CHECK,N_GUARD::R1(H),XS(e)
      • B(f);::B(A)+K(C)
      • S(e);N_GUARD::R1(H)
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