MESON Chess Problem Database

Problem Display
PID: 264912 (3RN1n1/8/4p1Bp/2p1kp1N/r2r3R/B1Q5/P2P4/4K2n w - - 0 1)

Novitski, Petr Adrinovich

3rd Comm., Astafyeva-30 JT (Kudesnik), 2021

3RN1n1/8/4p1Bp/2p1kp1N/r2r3R/B1Q5/P2P4/4K2n

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qxd4#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sd3#
      • 1...Ke4
        • 2.Qe3#
      • 1...c4
        • 2.Qxd4#
      • 1...Sf2!
    • 1.Bb2?
      • threat
        • 2.Qe3#
        • 2.Qxc5#
      • 1...Ra3
        • 2.Qxc5#
      • 1...Rc4
        • 2.Qe3#
      • 1...Ra5
        • 2.Qe3#
      • 1...Sf2
        • 2.Qxc5#
      • 1...Sg3
        • 2.Qxc5#
      • 1...Se7
        • 2.Qe3#
      • 1...c4
        • 2.Qxd4#
        • 2.Qe3#
      • 1...f4
        • 2.Qxc5#
      • 1...Sf6!
    • 1.Re4+?
      • 1...Kxe4
        • 2.Qe3#
      • 1...fxe4!
    • 1.Rd5+?
      • 1...Kxd5
        • 2.Qxc5#
      • 1...exd5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Kd5
        • 2.Qxc5#
      • 1...Ra7
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD,S_CUTR(b)::QAB1(E),XR(c)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT,P_SPINP(f),S_CUTR(c)::QAR1(E)
        • P(d);N_GUARD,S_CUTR(b)::QAB1(E),XR(c)
      • Refutation
        • S(a);
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR2(E),XP(d)
        • R(b);::QAR2(E)
        • S(a);::QAR2(E),XP(d)
        • S(i);::QAR2(E)
        • P(f);::QAR2(E),XP(d)
      • Refutation
        • S(i);
    • Try
      • R(F);CHECK
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT,P_SPINP(f),S_CUTR(c),XR(F)::QAR1(E)
      • Refutation
        • P(f);XR(F)
    • Try
      • R(I);CHECK
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT,S_CUTP(g),S_CUTR(c),XR(I)::QAR1(E),XP(d)
      • Refutation
        • P(g);XR(I)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • K(e);N_SPINR(c),P-FLIGHT,S_CUTR(c)::QAR1(E),XP(d)
      • R(b);N_GUARD::S(J)
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