MESON Chess Problem Database

Problem Display
PID: 17600 (B5r1/8/5p2/1ppR4/R1bqk2N/7N/2K1P3/1QB4n w - - 0 1)

Mansfield, Comins

1st Prize, American Chess Bulletin, 1948

B5r1/8/5p2/1ppR4/R1bqk2N/7N/2K1P3/1QB4n

#2

9 + 8

3105 FIDE Album (1945-1955) 1964
3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Kb2#
      • 2.Kd2#
      • 2.Kc3#
    • 1...Qb2+
      • 2.Kxb2#
    • 1...Qf2
      • 2.Kd1#
      • 2.Kb2#
      • 2.Kd2#
      • 2.Kc3#
    • 1...Qc3+
      • 2.Kxc3#
    • 1...Qe5
      • 2.Kd1#
      • 2.Kd2#
    • 1...Qd1+
      • 2.Kxd1#
    • 1...Qd2+
      • 2.Kxd2#
    • 1...Qd3+
      • 2.exd3#
    • 1...Bb3+
      • 2.Kxb3#
    • 1...Bd3+
      • 2.exd3#
  • Tries
    • 1.Sf2+?
      • 1...Qxf2
        • 2.Kd1#
        • 2.Kb2#
        • 2.Kc3#
      • 1...Sxf2!
    • 1.Rxd4+?
      • 1...Kxd4
        • 2.Sf3#
        • 2.Qa1#
        • 2.Qb2#
      • 1...Ke5!
    • 1.Rf5+?
      • 1...Qd5
        • 2.Kc3#
      • 1...Bd5
        • 2.Bxd5#
      • 1...Rxa8!
    • 1.Rg5+?
      • 1...Qd5
        • 2.Kc3#
      • 1...Bd5
        • 2.Bxd5#
      • 1...Rxa8!
    • 1.Rh5+?
      • 1...Qd5
        • 2.Kc3#
      • 1...Bd5
        • 2.Bxd5#
      • 1...Rxa8!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Re5#
      • 1...Qb2+
        • 2.Kxb2#
      • 1...Qc3+
        • 2.Kxc3#
      • 1...Qd1+
        • 2.Kxd1#
      • 1...Qd2+
        • 2.Kxd2#
      • 1...Qd3+
        • 2.exd3#
      • 1...Bb3+
        • 2.Kxb3#
      • 1...Bd3+
        • 2.exd3#
      • 1...Qxd5
        • 2.Kc3#
      • 1...Rxa8
        • 2.Qxh1#
      • 1...Bxd5
        • 2.Kc1#
      • 1...Qa1
        • 2.Rd8#
      • 1...Qg1
        • 2.Rd8#
      • 1...Qf2
        • 2.Kc1#
        • 2.Kd1#
        • 2.Kb2#
        • 2.Kd2#
        • 2.Kc3#
        • 2.Rd8#
      • 1...Qe3
        • 2.Rd8#
      • 1...Qe5
        • 2.Kc1#
        • 2.Kd1#
        • 2.Kd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,P_SPINB(b)::QAB(A)+K(C),XQ(c)
    • Q(c);CHECK,OGATE,P_SPINB(b)::P(D),XQ(c)
    • B(b);CHECK,P_SPINQ(c)::QAB(A)+K(C),XB(b)
    • B(b);CHECK,OGATE,P_SPINQ(c)::P(D),XB(b)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • S(a);XS(E)
    • Try
      • R(H);CHECK,XQ(c)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(H);CHECK
      • Vars
        • Q(c);P_SPINB(b),P_SPINQ(c)::QAB(A)+K(C)
        • B(b);N_GUARD,P_SPINB(b),P_SPINQ(c)::B(I),XB(b)
      • Refutation
        • R(h);XB(I)
    • Try
      • R(H);CHECK
      • Vars
        • Q(c);P_SPINB(b),P_SPINQ(c)::QAB(A)+K(C)
        • B(b);N_GUARD,P_SPINB(b),P_SPINQ(c)::B(I),XB(b)
      • Refutation
        • R(h);XB(I)
    • Try
      • R(H);CHECK
      • Vars
        • Q(c);P_SPINB(b),P_SPINQ(c)::QAB(A)+K(C)
        • B(b);N_GUARD,P_SPINB(b),P_SPINQ(c)::B(I),XB(b)
      • Refutation
        • R(h);XB(I)
  • Actual
    • B(B);
    • Threat
      • B(I)+R(H),DCHECK
    • Vars
      • Q(c);CHECK,P_SPINB(b)::QAB(A)+K(C),XQ(c)
      • Q(c);CHECK,OGATE,P_SPINB(b)::P(D),XQ(c)
      • B(b);CHECK,P_SPINQ(c)::QAB(A)+K(C),XB(b)
      • B(b);CHECK,OGATE,P_SPINQ(c)::P(D),XB(b)
      • Q(c);P_SPINB(b),P_SPINQ(c),XR(H)::QAB(A)+K(C)
      • R(h);N_GUARD,XB(I)::QAB(A),XS(a)
      • B(b);N_GUARD,P_SPINB(b),P_SPINQ(c),XR(H)::QAB(A)+K(C)
      • Q(c);N_GUARD,P_SPINB(b)::B(I)+R(H)
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