MESON Chess Problem Database

Problem Display
PID: 149362 (6nq/1RK1p3/3P4/2pk2N1/2n2Pp1/4PR2/Q3pr2/7B w - - 0 1)

Windle, REL

2nd HM., Good Companions (October), 1914

6nq/1RK1p3/3P4/2pk2N1/2n2Pp1/4PR2/Q3pr2/7B

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Rxf2#
    • 1...Qc3
      • 2.Rxf2#
    • 1...Qf6
      • 2.Rxf2#
    • 1...Qg7
      • 2.Rxf2#
    • 1...Sh6
      • 2.Rxf2#
  • Tries
    • 1.Rh3+?
      • 1...Rg2
        • 2.Bxg2#
      • 1...Rf3!
    • 1.Rb1?
      • threat
        • 2.Qa8#
      • 1...Qa1
        • 2.Rxf2#
      • 1...Qb2
        • 2.Rxf2#
      • 1...Sh6
        • 2.Rxf2#
      • 1...Sf6!
    • 1.Rb3?
      • threat
        • 2.Qa8#
      • 1...Sxe3
        • 2.Rd3#
      • 1...Sxd6
        • 2.Rd3#
      • 1...Sb2
        • 2.Rd3#
      • 1...Sd2
        • 2.Rd3#
      • 1...Sa3
        • 2.Rd3#
      • 1...Sa5
        • 2.Rd3#
      • 1...Se5
        • 2.Rd3#
      • 1...Sb6
        • 2.Rd3#
      • 1...Sf6
        • 2.Rd3#
      • 1...Sh6
        • 2.Rxf2#
      • 1...Qa1!
    • 1.Rb4?
      • threat
        • 2.Qxc4#
        • 2.Qa8#
      • 1...Qa1
        • 2.Qxc4#
      • 1...Qc3
        • 2.Rxf2#
        • 2.Qa8#
      • 1...Qd4
        • 2.Qa8#
      • 1...Sf6
        • 2.Qxc4#
      • 1...Sh6
        • 2.Rxf2#
        • 2.Qxc4#
      • 1...cxb4!
    • 1.Rb8?
      • threat
        • 2.Qa8#
      • 1...Qb2
        • 2.Rxf2#
      • 1...Qa1!
    • 1.Qd2+?
      • 1...Qd4
        • 2.Rxf2#
        • 2.e4#
      • 1...Sxd2!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Qa8#
      • 1...Qxb2
        • 2.Rxf2#
      • 1...Sf6
        • 2.Rd2#
      • 1...Sh6
        • 2.Rxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD::B(A)+R(D),XR(b)
    • S(h);S_CUTQ(i)::B(A)+R(D),XR(b)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::B(A),XR(b)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(H);
      • Threat
        • QAB(B)
      • Vars
        • Q(i);N_GUARD::B(A)+R(D),XR(b)
        • S(h);S_CUTQ(i)::B(A)+R(D),XR(b)
      • Refutation
        • S(h);
    • Try
      • R(H);N_PINS(c)
      • Threat
        • QAB(B)
      • Vars
        • S(c);XP(C)::QAB(B)+R(H),DCHECK
        • S(c);XP(G)::QAB(B)+R(H),DCHECK
        • S(c);::QAB(B)+R(H),DCHECK
        • S(h);S_CUTQ(i)::R(H)
        • S(h);S_CUTQ(i)::B(A)+R(D),XR(b)
      • Refutation
        • Q(i);
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);::QAB1(B),XS(c)
        • Q(i);::QAB(B)
        • S(h);::QAB1(B),XS(c)
      • Refutation
        • P(e);XR(H)
    • Try
      • R(H);
      • Threat
        • QAB(B)
      • Vars
        • Q(i);N_GUARD::B(A)+R(D),XR(b)
      • Refutation
        • Q(i);
    • Try
      • Q(B);CHECK,N_PINS(c)
      • Refutation
        • S(c);XQ(B)
  • Actual
    • R(H);
    • Threat
      • QAB(B)
    • Vars
      • Q(i);N_GUARD,XR(H)::B(A)+R(D),XR(b)
      • S(h);S_CUTQ(i)::R(H)
      • S(h);S_CUTQ(i)::B(A)+R(D),XR(b)
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