MESON Chess Problem Database

Problem Display
PID: 269 (8/2QNpr2/1B2P1Np/3k4/3r2nK/p1p2PpB/q3P3/3R2b1 w - - 0 1)

Mansfield, Comins

Tijdschrift vd KNSB, 1950

8/2QNpr2/1B2P1Np/3k4/3r2nK/p1p2PpB/q3P3/3R2b1

#2

10 + 11

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sxf4#
    • 1...Rg7
      • 2.Sf4#
    • 1...Rh7
      • 2.Sf4#
    • 1...Sf2+
      • 2.Rxd4#
    • 1...Sh2+
      • 2.e4#
    • 1...Se3+
      • 2.Rxd4#
    • 1...Se5+
      • 2.e4#
    • 1...Sf6+
      • 2.Sf4#
  • Tries
    • 1.Sde5?
      • threat
        • 2.Qc6#
        • 2.Qd7#
      • 1...Sf2+
        • 2.Rxd4#
      • 1...Sh2+
        • 2.e4#
      • 1...Se3+
        • 2.Rxd4#
      • 1...Sxe5+
        • 2.e4#
      • 1...Sf6+
        • 2.Sf4#
      • 1...Rxf3
        • 2.Qc6#
      • 1...Qc4
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Sf6+?
      • 1...Kxe6
        • 2.Qe5#
      • 1...Sxf6+
        • 2.Sf4#
      • 1...exf6
        • 2.Sf4#
      • 1...Rxf6!
    • 1.Rxd4+?
      • 1...Kxe6
        • 2.Qe5#
      • 1...Bxd4!
  • Keys
    • 1.Sb8!
      • threat
        • 2.Qc6#
      • 1...Sf2+
        • 2.Rxd4#
      • 1...Sh2+
        • 2.e4#
      • 1...Se3+
        • 2.Rxd4#
      • 1...Se5+
        • 2.e4#
      • 1...Sf6+
        • 2.Sf4#
      • 1...Kxe6
        • 2.Qe5#
      • 1...Qc4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(k);N_GUARD::S(H),XR(k)
    • R(k);N_GUARD::S(H)
    • S(g);CHECK,S_CUTB(a)::R1(A),XR(f)
    • S(g);CHECK::P(B)
    • S(g);CHECK,S_CUTR(k)::S(H)
  • Tries
    • Try
      • S(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);CHECK,S_CUTB(a)::R1(A),XR(f)
        • S(g);CHECK::P(B)
        • S(g);CHECK,XS(J)::P(B)
        • S(g);CHECK,S_CUTR(k)::S(H)
        • R(k);XP(C)::QAB1(I)
        • Q(b);::QAR2(I)
      • Refutation
        • K(h);N_SPINR(f),P_SPINS(g),S_FLIGHT,XP(G)
    • Try
      • S(J);CHECK
      • Vars
        • K(h);N_SPINR(f),P_SPINS(g),S_FLIGHT,XP(G)::QAR1(I)
        • S(g);CHECK,XS(J)::S(H)
        • P(j);XS(J)::S(H)
      • Refutation
        • R(k);XS(J)
    • Try
      • R(A);CHECK,XR(f)
      • Vars
        • K(h);P_SPINS(g),S_FLIGHT,XP(G)::QAR1(I)
      • Refutation
        • B(a);XR(A)
  • Actual
    • S(J);
    • Threat
      • QAB1(I)
    • Vars
      • S(g);CHECK,S_CUTB(a)::R1(A),XR(f)
      • S(g);CHECK::P(B)
      • S(g);CHECK,S_CUTR(k)::S(H)
      • K(h);N_SPINR(f),P_SPINS(g),S_FLIGHT,XP(G)::QAR1(I)
      • Q(b);SBLOCK::QAR2(I)
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