MESON Chess Problem Database

Problem Display
PID: 206076 (8/3p4/5B1n/b1N5/3RPkp1/2rp2R1/2P1BpK1/Q7 w - - 0 1)

Novitski, Petr Adrinovich

Vasilenko, Anatoly Grigorovich

Zadachi i Etyudi, 2018

8/3p4/5B1n/b1N5/3RPkp1/2rp2R1/2P1BpK1/Q7

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Sxd3#
    • 1...Rc4
      • 2.Sxd3#
    • 1...f1Q+
      • 2.Qxf1#
    • 1...f1S
      • 2.Qxf1#
    • 1...f1B+
      • 2.Qxf1#
    • 1...f1R
      • 2.Qxf1#
    • 1...d5
      • 2.Se6#
    • 1...d6
      • 2.Se6#
  • Tries
    • 1.Bxd3?
      • threat
        • 2.Qc1#
        • 2.e5#
      • 1...f1Q+
        • 2.Qxf1#
      • 1...f1B+
        • 2.Qxf1#
      • 1...Rxc2
        • 2.e5#
      • 1...Rxd3
        • 2.Sxd3#
      • 1...Rxc5
        • 2.e5#
      • 1...f1S
        • 2.Qxf1#
        • 2.e5#
      • 1...f1R
        • 2.Qxf1#
        • 2.e5#
      • 1...Ra3
        • 2.e5#
      • 1...Rb3
        • 2.e5#
      • 1...Sf5
        • 2.exf5#
      • 1...Rc4!
    • 1.Bg5+?
      • 1...Ke5
        • 2.Rd5#
      • 1...Kxg5!
    • 1.Rdxd3?
      • threat
        • 2.Qc1#
      • 1...f1Q+
        • 2.Qxf1#
      • 1...f1B+
        • 2.Qxf1#
      • 1...Rxc2
        • 2.Qe5#
      • 1...Rxd3
        • 2.Qe5#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#
      • 1...Ra3
        • 2.Qe5#
      • 1...Rb3
        • 2.Qe5#
      • 1...Rc4
        • 2.Qe5#
      • 1...Sf5
        • 2.Rxg4#
      • 1...Rxc5!
    • 1.Rd5?
      • threat
        • 2.Bg5#
      • 1...f1Q+
        • 2.Qxf1#
      • 1...f1B+
        • 2.Qxf1#
      • 1...Rxc5
        • 2.Qe5#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Sf7
        • 2.Rf5#
      • 1...Bd8!
  • Keys
    • 1.Bxg4!
      • threat
        • 2.e5#
      • 1...f1Q+
        • 2.Qxf1#
      • 1...f1B+
        • 2.Qxf1#
      • 1...Sxg4
        • 2.Rf3#
      • 1...Rc4
        • 2.Sxd3#
      • 1...Sf5
        • 2.exf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD,XP(B)::S(H),XP(c)
    • R(b);N_GUARD::S(H),XP(c)
    • P(a);CHECK,OGATEB::QAR(A),XQ(a)
    • P(a);OGATEB::QAR(A),XS(a)
    • P(a);CHECK,OGATEB::QAR(A),XB(a)
    • P(a);OGATEB::QAR(A),XR(a)
    • P(h);N_GUARD::S(H)
  • Tries
    • Try
      • B(C);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);CHECK,OGATEB::QAR(A),XQ(a)
        • P(a);CHECK,OGATEB::QAR(A),XB(a)
        • R(b);XP(B)::R(F)+P(G)
        • R(b);XB(C)::S(H),XR(b)
        • R(b);XS(H)::R(F)+P(G)
        • R(b);::R(F)+P(G)
        • S(g);OGATE::R(F)+P(G),XS(g)
      • Refutation
        • R(b);
    • Try
      • B(I);CHECK
      • Vars
        • K(d);S_FLIGHT::R1(F)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT,XB(I)
    • Try
      • R(F);XP(c)
      • Threat
        • QAB(A)
      • Vars
        • P(a);CHECK,OGATEB::QAR(A),XQ(a)
        • P(a);CHECK,OGATEB::QAR(A),XB(a)
        • R(b);OGATE,XP(B)::QAB1(A)
        • R(b);OGATE,XR(F)::QAB1(A)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XR(a)
        • R(b);OGATE::QAB1(A)
        • S(g);N_GUARD::R1(E),XP(e)
      • Refutation
        • R(b);XS(H)
    • Try
      • R(F);
      • Threat
        • B(I)
      • Vars
        • P(a);CHECK,OGATEB::QAR(A),XQ(a)
        • P(a);CHECK,OGATEB::QAR(A),XB(a)
        • R(b);OGATE,XS(H)::QAB1(A)
        • S(g);N_GUARD::R1(F),XS(g)
        • S(g);N_GUARD::R1(F)
      • Refutation
        • B(f);
  • Actual
    • B(C);XP(e)
    • Threat
      • R(F)+P(G)
    • Vars
      • P(a);CHECK,OGATEB::QAR(A),XQ(a)
      • P(a);CHECK,OGATEB::QAR(A),XB(a)
      • S(g);SBLOCK,XB(C)::R1(E)
      • R(b);N_GUARD::S(H),XP(c)
      • S(g);OGATE::R(F)+P(G),XS(g)
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