MESON Chess Problem Database

Problem Display
PID: 11995 (8/r1p5/8/3Q1ppb/1PK4b/4p3/P2pP3/R1NkN2R w - - 0 1)

Mansfield, Comins

The Problemist, 1973

8/r1p5/8/3Q1ppb/1PK4b/4p3/P2pP3/R1NkN2R

#2

9 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2+
      • 2.Scd3#
  • Tries
    • 1.Sc2+?
      • 1...Be1
        • 2.Sxe3#
      • 1...Kxc2!
    • 1.Sg2+?
      • 1...Be1
        • 2.Sxe3#
      • 1...Kc2!
    • 1.Qd3?
      • threat
        • 2.Sb3#
        • 2.Qc2#
        • 2.Qb3#
      • 1...Rxa2
        • 2.Sxa2#
      • 1...Bxe1
        • 2.Sb3#
        • 2.Qb3#
      • 1...Bxe2
        • 2.Sxe2#
        • 2.Sb3#
        • 2.Qxe2#
      • 1...Ra3
        • 2.Sb3#
        • 2.Qc2#
      • 1...Bf7+!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Sb3#
        • 2.Qb3#
      • 1...Ra3+
        • 2.Sb3#
      • 1...Bxe2+
        • 2.Sxe2#
      • 1...dxc1S+
        • 2.Kxe3#
      • 1...dxe1S+
        • 2.Kc3#
      • 1...Rxa2
        • 2.Sxa2#
      • 1...dxc1Q
        • 2.Qb3#
      • 1...dxc1B
        • 2.Qb3#
      • 1...dxc1R
        • 2.Kxe3#
        • 2.Qb3#
      • 1...Bf7
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(g);CHECK,SBLOCK,XP(F)::R(A)+S(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • B(d);P_SPINB(d)::S(C),XP(c)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • B(d);P_SPINB(d)::S(C),XP(c)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • R(h);XP(E)::R(A)+S(B),XR(h)
      • Refutation
        • B(g);CHECK
  • Actual
    • K(H);N_PINP(b),S_FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • R(h);CHECK::R(A)+S(B)
      • B(g);CHECK,XP(F)::R(A)+S(B),XB(g)
      • P(b);CHECK,P_SPINS(b),XS(B)::QAR(I)+K(H),XP(c)
      • P(b);CHECK,P_SPINS(b),XS(C)::QAR(I)+K(H)
      • R(h);XP(E)::R(A)+S(B),XR(h)
      • P(b);P_SPINQ(b),XS(B)::QAB(I)
      • P(b);P_SPINB(b),XS(B)::QAB(I)
      • B(g);::R(A)+S(B)
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