MESON Chess Problem Database

Problem Display
PID: 55570 (1n4Qr/1Kn2p2/RN2k3/2P1N2p/6PB/4R3/8/5rb1 w - - 0 1)

Mansfield, Comins

The Problemist, 1976

1n4Qr/1Kn2p2/RN2k3/2P1N2p/6PB/4R3/8/5rb1

#2

9 + 8

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qxf7#
    • 1...Rb1
      • 2.Qxf7#
    • 1...Rc1
      • 2.Qxf7#
    • 1...Rd1
      • 2.Qxf7#
    • 1...Re1
      • 2.Qxf7#
    • 1...Rf2
      • 2.Sd3#
      • 2.Sf3#
      • 2.Sec4#
      • 2.Sc6#
      • 2.Sg6#
      • 2.Sed7#
      • 2.Sxf7#
    • 1...Bf2
      • 2.Qxf7#
  • Tries
    • 1.Qg6+?
      • 1...Rf6
        • 2.Qxf6#
      • 1...f6
        • 2.Qf7#
      • 1...fxg6!
    • 1.Qc8+?
      • 1...Sd7
        • 2.Qxd7#
      • 1...Rxc8!
  • Keys
    • 1.Bf2!
      • threat
        • 2.Sed7#
        • 2.Qxf7#
      • 1...Kf6
        • 2.Sd5#
      • 1...Ke7
        • 2.Sc8#
      • 1...Rxf2
        • 2.Sed7#
      • 1...Rxg8
        • 2.Sed7#
      • 1...Bxf2
        • 2.Qxf7#
      • 1...hxg4
        • 2.Qxf7#
      • 1...Re1
        • 2.Qxf7#
      • 1...Rh7
        • 2.Sed7#
      • 1...Bh2
        • 2.Qxf7#
      • 1...Sd5
        • 2.Qxf7#
      • 1...Sc6
        • 2.Qxf7#
      • 1...Sd7
        • 2.Sexd7#
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::QAB1(I),XP(f)
    • R(a);N_GUARD,P_PINS(G)::QAB1(I),XP(f)
    • B(b);S_CUTR(a)::QAB1(I),XP(f)
  • Tries
    • Try
      • Q(I);CHECK,N_PINP(f)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(I),XR(a)
        • P(f);P_SPINP(f),S_CUTR(a)::QAB1(I)
      • Refutation
        • P(f);XQ(I)
    • Try
      • Q(I);CHECK,N_PINP(f)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB1(I),XS(g)
      • Refutation
        • R(h);XQ(I)
  • Actual
    • B(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);N_SPINP(f),P-FLIGHT::R(F)+S(G),DCHECK
      • K(d);N_SPINP(f),P-FLIGHT::S(G)
      • R(a);XB(C)::R(A)+S(E)
      • R(h);N_SPINP(f),XQ(I)::R(A)+S(E)
      • B(b);XB(C)::QAB1(I),XP(f)
      • P(c);XP(B)::QAB1(I),XP(f)
      • R(a);::QAB1(I),XP(f)
      • R(h);::R(A)+S(E)
      • B(b);::QAB1(I),XP(f)
      • S(e);::QAB1(I),XP(f)
      • S(g);::QAB1(I),XP(f)
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