MESON Chess Problem Database

Problem Display
PID: 70640 (8/5Qp1/3rPq2/8/6BN/4P3/1R1P1k2/4N1RK w - - 0 1)

Major, Montgomery

Chess, 1951

8/5Qp1/3rPq2/8/6BN/4P3/1R1P1k2/4N1RK

#2

10 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3+
      • 2.Qxf3#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Rd3
      • 2.Sxd3#
    • 1...Ra6
      • 2.Sd3#
    • 1...Rb6
      • 2.Sd3#
    • 1...Rc6
      • 2.Sd3#
    • 1...Rxe6
      • 2.Sd3#
    • 1...g5
      • 2.Qxf6#
    • 1...g6
      • 2.Qxf6#
  • Tries
    • 1.Rg2+?
      • 1...Kxe1
        • 2.Rb1#
      • 1...Kf1!
  • Keys
    • 1.Sf5!
      • threat
        • 2.d4#
      • 1...Qh4+
        • 2.Sxh4#
      • 1...Qh6+
        • 2.Sxh6#
      • 1...Qxb2
        • 2.Sd4#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Rxd2
        • 2.Sd3#
        • 2.Rxd2#
      • 1...Qc3
        • 2.Sd4#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Rd4
        • 2.d3#
      • 1...Rb6
        • 2.Sd3#
      • 1...Rc6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • Q(c);CHECK,OGATE::QAR1(J),XQ(c)
    • Q(c);OGATE::QAR2(J),XQ(c)
    • Q(c);OGATE::QAR(J),XQ(c)
    • R(b);N_GUARD::S(A),XR(b)
    • R(b);N_GUARD::S(A)
    • R(b);N_GUARD,XP(I)::S(A)
    • P(d);N_GUARD::QAR(J),XQ(c)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);N_SPINQ(c),S_FLIGHT,XS(A)::R(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(H);N_PINQ(c)
    • Threat
      • R(D)+P(E)
    • Vars
      • Q(c);CHECK::QAR(J)+S(H),XQ(c)
      • Q(c);XR(D)::QAR(J)+S(H)
      • Q(c);OGATE,P_SPINQ(c),XS(H)::QAR(J),XQ(c)
      • Q(c);::QAR(J)+S(H)
      • Q(c);::QAR(J)+S(H),XQ(c)
      • R(b);N_GUARD::S(A),XR(b)
      • R(b);S_CUTQ(c)::R(D)+P(E)
      • R(b);N_GUARD::S(A)
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