MESON Chess Problem Database

Problem Display
PID: 55217 (3R4/8/2K1Qp1B/2p5/1p1q1p1n/1B1k4/1P1n1P1b/3R4 w - - 0 1)

Mansfield, Comins

6th HM., 64 Shakhmatnoe obozrenie, 1972

3R4/8/2K1Qp1B/2p5/1p1q1p1n/1B1k4/1P1n1P1b/3R4

#2

8 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5+
      • 2.Rxd5#
    • 1...Qd6+
      • 2.Rxd6#
    • 1...Qd7+
      • 2.Rxd7#
    • 1...Qxd8
      • 2.Qc4#
    • 1...f3
      • 2.Rxd2#
      • 2.Qe3#
  • Tries
    • 1.Bxf4?
      • threat
        • 2.Rxd2#
        • 2.Qe3#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Qd6+
        • 2.Rxd6#
      • 1...Qd7+
        • 2.Rxd7#
      • 1...Sg2
        • 2.Rxd2#
      • 1...Sf3
        • 2.Qe3#
      • 1...Sf5
        • 2.Rxd2#
      • 1...Bxf4!
    • 1.Rxd4+?
      • 1...Kxd4
        • 2.Rxd2#
        • 2.Qd5#
      • 1...cxd4!
    • 1.Qe1?
      • threat
        • 2.Rxd2#
      • 1...Qd5+
        • 2.Rxd5#
      • 1...Qd6+
        • 2.Rxd6#
      • 1...Qd7+
        • 2.Rxd7#
      • 1...Sf3!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qe2#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...Qd6+
        • 2.Qxd6#
      • 1...Qd7+
        • 2.Qxd7#
      • 1...Qxb2
        • 2.Qc4#
      • 1...Qxf2
        • 2.Qc4#
        • 2.Qe4#
      • 1...Qc3
        • 2.Qe4#
      • 1...Qe3
        • 2.Qc4#
      • 1...Qe5
        • 2.Qc4#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qd8
        • 2.Rxd8#
        • 2.Qc4#
        • 2.Qe4#
      • 1...f3
        • 2.Rxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(e);CHECK,OGATEB::R(H),XQ(e)
    • Q(e);N_SPINQ(e),XR(H)::QAB1(F)
  • Tries
    • Try
      • B(G);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);CHECK,OGATEB::R(H),XQ(e)
        • S(g);::R1(A),XS(a)
        • S(g);::QAR1(F)
      • Refutation
        • B(b);XB(G)
    • Try
      • R(H);CHECK,XQ(e)
      • Refutation
        • P(h);XR(H)
    • Try
      • Q(F);
      • Threat
        • R1(A),XS(a)
      • Vars
        • Q(e);CHECK,OGATEB::R(H),XQ(e)
      • Refutation
        • S(g);
  • Actual
    • R(H);N_PINQ(e)
    • Threat
      • QAB1(F)
    • Vars
      • Q(e);CHECK,N_GUARD::QAB1(F),XQ(e)
      • Q(e);CHECK,OGATEB::QAR2(F),XQ(e)
      • Q(e);CHECK,OGATEB::QAR(F),XQ(e)
      • Q(e);N_GUARD,XP(B)::QAB1(F)
      • Q(e);N_GUARD::QAB1(F)
      • Q(e);N_GUARD::QAB1(F),XQ(e)
      • P(f);::R1(A),XS(a)
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