MESON Chess Problem Database

Problem Display
PID: 23736 (4NqB1/K2p4/1R2n1b1/2P1P3/Ppk1nQ2/2p3p1/2P5/3R2B1 w - - 0 1)

Smirnov, Nikolai A

Die Schwalbe, 1996

4NqB1/K2p4/1R2n1b1/2P1P3/Ppk1nQ2/2p3p1/2P5/3R2B1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.Qf1#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qh6
      • 2.Sd6#
      • 2.Qf1#
    • 1...Qe7
      • 2.Qf1#
    • 1...Qg7
      • 2.Sd6#
      • 2.Qf1#
    • 1...Qf5
      • 2.Sd6#
    • 1...Qf6
      • 2.Sd6#
    • 1...Qf7
      • 2.Sd6#
    • 1...Qxe8
      • 2.Qf1#
    • 1...Qxg8
      • 2.Sd6#
      • 2.Qf1#
    • 1...Bf5
      • 2.Qf1#
    • 1...Bh5
      • 2.Qxe4#
    • 1...Bf7
      • 2.Qf1#
    • 1...Bxe8
      • 2.Qxe4#
    • 1...b3
      • 2.cxb3#
  • Tries
    • 1.Bxe6+?
      • 1...d5
        • 2.Bxd5#
        • 2.cxd5 ep#
        • 2.exd5 ep#
      • 1...dxe6!
    • 1.Bf7?
      • threat
        • 2.Qf1#
      • 1...Qxf7
        • 2.Sd6#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Bh5
        • 2.Qxe4#
      • 1...g2!
    • 1.Rb5?
      • threat
        • 2.Rd4#
      • 1...Qxc5+
        • 2.Rxc5#
      • 1...Qxg8
        • 2.Sd6#
        • 2.Qf1#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qf7
        • 2.Sd6#
      • 1...Bf7
        • 2.Qf1#
      • 1...d5!
    • 1.Qg4?
      • threat
        • 2.Qe2#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qf1
        • 2.Sd6#
      • 1...Qf3
        • 2.Sd6#
      • 1...Bh5
        • 2.Qxe4#
      • 1...Qf2!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rd4#
      • 1...Qxc5+
        • 2.Rxc5#
      • 1...Qxg8
        • 2.Sd6#
        • 2.Qf1#
      • 1...dxc6
        • 2.Bxe6#
      • 1...Qd6
        • 2.Sxd6#
      • 1...Qf7
        • 2.Sd6#
      • 1...Bf7
        • 2.Qf1#
      • 1...d5
        • 2.cxd5 ep#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD,P_PINR(H),XP(F)::QAB(E)
    • Q(i);N_GUARD::S(J),XQ(i)
    • Q(i);N_GUARD::QAB(E)
    • Q(i);N_GUARD::S(J)
    • Q(i);N_GUARD,XS(J)::QAB(E)
    • B(g);S_CUTQ(i)::QAB(E)
    • B(g);N_GUARD::QAR2(E),XS(e)
    • B(g);N_GUARD,XS(J)::QAR2(E),XS(e)
    • P(c);OGATE::P(C),XP(c)
  • Tries
    • Try
      • B(K);CHECK,XS(f)
      • Refutation
        • P(h);XB(K)
    • Try
      • B(K);
      • Threat
        • QAB(E)
      • Vars
        • Q(i);N_GUARD,XB(K)::S(J)
        • Q(i);N_GUARD::S(J),XQ(i)
        • B(g);N_GUARD::QAR2(E),XS(e)
      • Refutation
        • P(b);
    • Try
      • R(H);
      • Threat
        • R1(A)
      • Vars
        • Q(i);CHECK,OGATE,XP(F)::R1(H),XQ(i)
        • Q(i);N_GUARD::S(J),XQ(i)
        • Q(i);N_GUARD::S(J)
        • B(g);S_CUTQ(i)::QAB(E)
      • Refutation
        • P(h);
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • Q(i);N_GUARD::S(J),XQ(i)
        • Q(i);N_GUARD::S(J)
        • B(g);N_GUARD::QAR2(E),XS(e)
      • Refutation
        • Q(i);
  • Actual
    • R(H);
    • Threat
      • R1(A)
    • Vars
      • Q(i);CHECK,OGATE,P_SPINQ(i),XP(F)::R1(H),XQ(i)
      • P(h);N_GUARD,XR(H)::B(K),XS(f)
      • Q(i);N_GUARD::S(J),XQ(i)
      • Q(i);N_GUARD::S(J)
      • B(g);S_CUTQ(i)::QAB(E)
      • P(h);OGATE::R(H)+P(F),XP(h),EP
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