MESON Chess Problem Database

Problem Display
PID: 55378 (4R3/4N3/8/6pr/p1pPkPPp/r4n1K/3Q1P1b/qbN4B w - - 0 1)

Mansfield, Comins

diagrammes, 1974

4R3/4N3/8/6pr/p1pPkPPp/r4n1K/3Q1P1b/qbN4B

#2

10 + 11

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Bd3
      • 2.Qe3#
    • 1...c3
      • 2.Qe3#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Sc5#
        • 2.Qe3#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Bxf4
        • 2.Sc5#
      • 1...axb3
        • 2.Qe3#
      • 1...cxb3
        • 2.Qe3#
      • 1...gxf4
        • 2.Qe2#
      • 1...Qc3
        • 2.Sc5#
      • 1...Bd3
        • 2.Qe3#
      • 1...Rxb3!
    • 1.Qe1+?
      • 1...Kxf4
        • 2.Sd5#
      • 1...Re3
        • 2.Qxe3#
      • 1...Kxd4!
    • 1.Qe2+?
      • 1...Kxf4
        • 2.Sd5#
      • 1...Re3
        • 2.Qxe3#
      • 1...Kxd4!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Sc6#
      • 1...Kxf4
        • 2.Sd5#
      • 1...Qxd4
        • 2.Qf5#
      • 1...Bxf4
        • 2.Qd5#
      • 1...gxf4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD::QAR1(C)
    • R(d);N_GUARD::QAR1(C),XR(d)
    • B(b);S_CUTR(d)::QAR1(C)
    • P(g);S_CUTR(d)::QAR1(C)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);OGATE,XP(F)::QAR1(C),XQ(a)
        • B(c);XP(G)::S(A)
        • P(f);XS(A)::QAR1(C)
        • P(g);XS(A)::QAR1(C)
        • P(j);SBLOCK,XP(G)::QAR2(C)
        • Q(a);::S(A)
        • B(b);::QAR1(C)
      • Refutation
        • R(d);XS(A)
    • Try
      • Q(C);CHECK
      • Vars
        • K(h);N_SPINS(e),P-FLIGHT,XP(G)::S(I)
        • R(d);N_GUARD,P_SPINR(d)::QAR1(C),XR(d)
      • Refutation
        • K(h);N_SPINS(e),P-FLIGHT,XP(F)
    • Try
      • Q(C);CHECK
      • Vars
        • K(h);N_SPINS(e),P-FLIGHT,XP(G)::S(I)
        • R(d);N_GUARD,P_SPINR(d)::QAR1(C),XR(d)
      • Refutation
        • K(h);N_SPINS(e),P-FLIGHT,XP(F)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(h);N_SPINS(e),P-FLIGHT,XP(F)::S(I)
      • K(h);N_SPINS(e),P-FLIGHT,XP(G)::S(I)
      • Q(a);SBLOCK,XP(F)::QAB1(C)
      • B(c);SBLOCK,XP(G)::QAB1(C)
      • P(j);SBLOCK,XP(G)::R(J)+S(I)
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