MESON Chess Problem Database

Problem Display
PID: 17446 (3Q3K/8/2p4B/2p1N2R/p2bk3/3N1p2/r4n2/n1rR4 w - - 0 1)

Mansfield, Comins

The Chess Problem, 1946

3Q3K/8/2p4B/2p1N2R/p2bk3/3N1p2/r4n2/n1rR4

#2

7 + 10

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Sxf2#
    • 1...Bc3
      • 2.Sxc5#
    • 1...Bxe5+
      • 2.Rxe5#
  • Tries
    • 1.Sxf2+?
      • 1...Bxf2
        • 2.Qd3#
      • 1...Rxf2!
    • 1.Sxc5+?
      • 1...Rxc5
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Bxc5!
    • 1.Qf6?
      • threat
        • 2.Qxf3#
        • 2.Qxc6#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...Bb2
        • 2.Sxf2#
      • 1...Bc3
        • 2.Sxc5#
      • 1...Be3!
    • 1.Qc7?
      • threat
        • 2.Qxc6#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Bb2
        • 2.Sxf2#
      • 1...Bc3
        • 2.Sxc5#
      • 1...Be3!
    • 1.Qd6?
      • threat
        • 2.Qxc6#
      • 1...Bxe5+
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Bb2
        • 2.Sxf2#
      • 1...Bc3
        • 2.Sxc5#
      • 1...Be3!
    • 1.Qd7?
      • threat
        • 2.Qxc6#
      • 1...Bxe5+
        • 2.Rxe5#
      • 1...Bb2
        • 2.Sxf2#
      • 1...Bc3
        • 2.Sxc5#
      • 1...Be3!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qxc6#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Bb2
        • 2.Sxf2#
      • 1...Bc3
        • 2.Sxc5#
      • 1...Be3
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(g);N_GUARD,S_CUTR(c)::S(B),XS(d)
    • B(g);N_GUARD,S_CUTR(b)::S(B),XP(i)
    • B(g);CHECK,OGATE,XS(C)::R1(D),XB(g)
  • Tries
    • Try
      • S(B);CHECK,XS(d)
      • Vars
        • B(g);N_PINS(C),OGATE,XS(B)::QAB1(F)
      • Refutation
        • R(c);XS(B)
    • Try
      • S(B);CHECK,XP(i)
      • Refutation
        • B(g);N_PINS(C),XS(B)
    • Try
      • Q(F);N_SPINS(C)
      • Threat
        • DUALS(2)
      • Vars
        • K(h);S_FLIGHT::QAB1(F),XP(j)
        • B(g);OGATE,P_PINQ(F),XS(C)::QAR1(F),XB(g)
        • B(g);N_GUARD,S_CUTR(c)::S(B),XS(d)
        • B(g);N_GUARD,S_CUTR(b)::S(B),XP(i)
      • Refutation
        • B(g);
    • Try
      • Q(F);
      • Threat
        • QAB(F),XP(j)
      • Vars
        • B(g);CHECK,OGATE,XS(C)::QAR1(F),XB(g)
        • K(h);S_FLIGHT::QAB1(F),XP(j)
        • B(g);N_GUARD,S_CUTR(c)::S(B),XS(d)
        • B(g);N_GUARD,S_CUTR(b)::S(B),XP(i)
      • Refutation
        • B(g);N_PINS(C)
    • Try
      • Q(F);
      • Threat
        • QAB(F),XP(j)
      • Vars
        • B(g);N_GUARD,S_CUTR(c)::S(B),XS(d)
        • B(g);N_GUARD,S_CUTR(b)::S(B),XP(i)
      • Refutation
        • B(g);N_PINS(C)
    • Try
      • Q(F);
      • Threat
        • QAB(F),XP(j)
      • Vars
        • B(g);CHECK,OGATE,XS(C)::R1(D),XB(g)
        • B(g);N_GUARD,S_CUTR(c)::S(B),XS(d)
        • B(g);N_GUARD,S_CUTR(b)::S(B),XP(i)
      • Refutation
        • B(g);N_PINS(C)
  • Actual
    • Q(F);
    • Threat
      • QAB(F),XP(j)
    • Vars
      • B(g);CHECK,OGATE,P_SPINB(g),XS(C)::QAR1(F),XB(g)
      • K(h);S_FLIGHT::QAB1(F),XP(j)
      • B(g);N_GUARD,S_CUTR(c)::S(B),XS(d)
      • B(g);N_GUARD,S_CUTR(b)::S(B),XP(i)
      • B(g);N_PINS(C)::QAR(F)+S(C),XP(j)
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