MESON Chess Problem Database

Problem Display
PID: 56124 (q7/8/3P1P2/2PkN3/2Rp1K2/2p4Q/B7/8 w - - 0 1)

Mansfield, Comins

Contromossa Scacchi, 1981

q7/8/3P1P2/2PkN3/2Rp1K2/2p4Q/B7/8

#2

8 + 4

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Rxc3#
    • 1...Qc8
      • 2.Rxc3#
    • 1...Qd8
      • 2.Rxc3#
    • 1...Qe8
      • 2.Rxc3#
    • 1...Qf8
      • 2.Rxc3#
    • 1...Qg8
      • 2.Rxc3#
    • 1...Qh8
      • 2.Rxc3#
  • Tries
    • 1.Kf5?
      • threat
        • 2.Qg2#
        • 2.Qh1#
        • 2.Qf3#
      • 1...Qxa2
        • 2.Qf3#
      • 1...Qg8
        • 2.Rxc3#
        • 2.Qf3#
      • 1...Qh8
        • 2.Rxc3#
        • 2.Qg2#
        • 2.Qf3#
      • 1...Qc8+!
    • 1.Rxd4+?
      • 1...Kxd4
        • 2.Qe3#
      • 1...Kxc5!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Ra4#
      • 1...Qxa2
        • 2.Qg8#
      • 1...Qxc8
        • 2.Rxc3#
      • 1...Qb7
        • 2.Rb4#
      • 1...Qc6
        • 2.Rxc3#
        • 2.Qg8#
      • 1...Qa3
        • 2.Qg8#
      • 1...Qa4
        • 2.Rxa4#
        • 2.Qg8#
      • 1...Qa6
        • 2.Qg8#
      • 1...Qb8
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • Q(d);N_GUARD::B(A)+R(C),XP(a)
    • Q(d);N_GUARD,P_PINP(H)::B(A)+R(C),XP(a)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • Q(d);XB(A)::QAB(B)
      • Refutation
        • Q(d);CHECK
    • Try
      • R(C);CHECK,XP(b)
      • Vars
        • K(c);P-FLIGHT,XR(C)::QAB1(B)
      • Refutation
        • K(c);P-FLIGHT,XP(E)
  • Actual
    • Q(B);
    • Threat
      • B(A)+R(C)
    • Vars
      • Q(d);N_GUARD,XB(A)::QAB(B)
      • Q(d);N_GUARD,XQ(B)::B(A)+R(C),XP(a)
      • Q(d);N_GUARD::B(A)+R(C)
      • Q(d);N_GUARD::QAB(B)
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