MESON Chess Problem Database

Problem Display
PID: 246298 (8/R6K/bkN5/1p3Q2/3R4/2N5/rp1rp3/3q2BB w - - 0 1)

Makaronets, Leonid

Schweizerische Schachzeitung, 1994

8/R6K/bkN5/1p3Q2/3R4/2N5/rp1rp3/3q2BB

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Rxd2#
      • 2.Rd3#
    • 1...Qb3
      • 2.Rxd2#
      • 2.Rd3#
    • 1...Rc2
      • 2.Rxd1#
    • 1...Bc8
      • 2.Qxb5#
    • 1...e1S
      • 2.Rxd2#
    • 1...b4
      • 2.Rxb4#
  • Tries
    • 1.Bh2?
      • threat
        • 2.Bc7#
      • 1...Bb7
        • 2.Qxb5#
      • 1...Qxh1!
    • 1.Rc4+?
      • 1...Rd4
        • 2.Sd5#
        • 2.Qc5#
      • 1...Qxg1!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Sd5#
      • 1...Qxc2+
        • 2.Rd3#
      • 1...Kc5
        • 2.Sa4#
      • 1...Rxc2
        • 2.Rxd1#
      • 1...b4
        • 2.Rxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(d);OGATE::B(A)+R(D),XQ(a)
    • B(g);N_GUARD::QAR1(E),XP(f)
    • P(e);S_CUTQ(a)::B(A)+R(D),XR(d)
    • P(f);::B(A)+R(D),DCHECK,XP(f)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • B(g);N_GUARD::QAR1(E),XP(f)
      • Refutation
        • Q(a);P_PINB(A),XB(B)
    • Try
      • R(D);CHECK
      • Refutation
        • Q(a);XB(A)
  • Actual
    • Q(E);
    • Threat
      • S(C)
    • Vars
      • Q(a);CHECK,N_GUARD,XQ(E)::B(A)+R(D)
      • K(h);S_FLIGHT::QAR(E)+S(C),DCHECK
      • R(d);OGATE,XQ(E)::B(A)+R(D),XQ(a)
      • P(f);::B(A)+R(D),DCHECK,XP(f)
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