MESON Chess Problem Database

Problem Display
PID: 17939 (8/1K2p3/pPR1P1p1/3k4/r5N1/1P2Q3/8/b7 w - - 0 1)

Mansfield, Comins

Die Schwalbe, 1952

8/1K2p3/pPR1P1p1/3k4/r5N1/1P2Q3/8/b7

#2

7 + 6

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.bxc4#
    • 1...Rd4
      • 2.Qe5#
    • 1...Re4
      • 2.Qc5#
    • 1...Bd4
      • 2.Qf3#
    • 1...Be5
      • 2.Qxe5#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Rc5#
      • 1...Be5+
        • 2.Qxe5#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rd4
        • 2.Qe5#
      • 1...Re4
        • 2.Qc5#
      • 1...Bd4
        • 2.Qf3#
      • 1...Ra5!
    • 1.Qd3+?
      • 1...Bd4
        • 2.Qf3#
      • 1...Rd4!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Qc5#
      • 1...Rc4
        • 2.bxc4#
      • 1...Rd4
        • 2.Qg5#
      • 1...Ra5
        • 2.Qe4#
      • 1...Bd4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(b);OGATE::P(A),XR(b)
    • R(b);S_CUTB(a)::QAR1(B)
    • R(b);SBLOCK::QAR1(B)
    • B(a);SBLOCK,S_CUTR(b)::QAB(B)
    • B(a);N_GUARD::QAR1(B),XB(a)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Threat
        • R1(E)
      • Vars
        • B(a);CHECK,N_GUARD::QAR1(B),XB(a)
        • R(b);OGATE,P_PINR(E)::P(A),XR(b)
        • R(b);S_CUTB(a)::QAR1(B)
        • R(b);SBLOCK::QAR1(B)
        • B(a);SBLOCK,S_CUTR(b)::QAB(B)
      • Refutation
        • R(b);
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);P_SPINB(a),SBLOCK,S_CUTR(b)::QAB(B)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • R(b);OGATE::P(A),XR(b)
      • R(b);SBLOCK,S_CUTB(a)::QAR(B)
      • R(b);N_GUARD::QAB1(B)
      • B(a);S_CUTR(b)::QAB1(B)
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