MESON Chess Problem Database

Problem Display
PID: 20 (b2q4/8/5p1B/4p3/1R1Nk3/2prN2p/Q1Bb4/4R2K w - - 0 1)

Mansfield, Comins

4th HM., Brisbane Courier, 1930

b2q4/8/5p1B/4p3/1R1Nk3/2prN2p/Q1Bb4/4R2K

#2

8 + 9

3202 Complete Mansfield/I 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Qxa8#
    • 1...Bxe3
      • 2.Rxe3#
  • Tries
    • 1.Sd1+?
      • 1...Be3
        • 2.Sf2#
        • 2.Sxc3#
        • 2.Rxe3#
      • 1...Bxe1!
    • 1.Sf1+?
      • 1...Be3
        • 2.Sg3#
        • 2.Rxe3#
      • 1...Bxe1!
    • 1.Sg2+?
      • 1...Be3
        • 2.Rxe3#
      • 1...Bxe1!
    • 1.Sg4+?
      • 1...Be3
        • 2.Sf2#
        • 2.Rxe3#
      • 1...Bxe1!
    • 1.Sd5+?
      • 1...Be3
        • 2.Sxc3#
        • 2.Rxe3#
      • 1...Bxe1!
    • 1.Sef5+?
      • 1...Be3
        • 2.Sg3#
        • 2.Rxe3#
      • 1...Bxe1!
    • 1.Se2+?
      • 1...Qd4
        • 2.Qxa8#
      • 1...Kf3!
    • 1.Sb3+?
      • 1...Qd4
        • 2.Qxa8#
      • 1...Kf3!
    • 1.Sf3+?
      • 1...Qd4
        • 2.Qxa8#
      • 1...Kxf3!
    • 1.Sb5+?
      • 1...Qd4
        • 2.Qxa8#
      • 1...Kf3!
    • 1.Sdf5+?
      • 1...Qd4
        • 2.Qxa8#
      • 1...Kf3!
    • 1.Sc6+?
      • 1...Qd4
        • 2.Qd5#
      • 1...Kf3!
    • 1.Se6+?
      • 1...Qd4
        • 2.Qxa8#
      • 1...Kf3!
    • 1.Qxa8+?
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qxa8!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Bf3#
      • 1...Qxd4
        • 2.Qxa8#
      • 1...Rxe3
        • 2.Bc2#
      • 1...Rxd4
        • 2.Qc2#
      • 1...exd4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(i);N_GUARD,P_SPINQ(i),XS(G)::QAB(C),XB(h)
    • B(a);OGATE,P_SPINB(a),XS(E)::R1(A),XB(a)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XR(A)
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XR(A)
    • Try
      • S(E);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::R1(A),XB(a)
      • Refutation
        • B(a);XR(A)
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XR(A)
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XR(A)
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XR(A)
    • Try
      • S(G);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::QAB(C),XB(h)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::QAB(C),XB(h)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::QAB(C),XB(h)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT,XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::QAB(C),XB(h)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::QAB(C),XB(h)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::QAB1(C)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • Q(i);P_SPINQ(i)::QAB(C),XB(h)
      • Refutation
        • K(e);N_SPINR(c),S_FLIGHT
    • Try
      • Q(C);CHECK,XB(h)
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(C),XQ(i)
      • Refutation
        • Q(i);XQ(C)
  • Actual
    • B(D);N_PINR(c)
    • Threat
      • B(D)
    • Vars
      • Q(i);N_GUARD,P_SPINQ(i),XS(G)::QAB(C),XB(h)
      • R(c);OGATEB,P_SPINR(c),XS(E)::B(D)
      • R(c);OGATEB,P_SPINR(c),XS(G)::QAB(C)
      • P(f);OGATEB,P_SPINP(f),XS(G)::QAR2(C)
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