MESON Chess Problem Database

Problem Display
PID: 278913 (3B4/8/R7/4pN1P/1K3k2/7Q/3P4/8 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

Shakhmatnaya kompozitsiya, 2024

3B4/8/R7/4pN1P/1K3k2/7Q/3P4/8

#2

7 + 2

5454 Near Snap 2025

SOLUTION

  • SOUND
  • Tries
    • 1.Kc4?
      • 1...Ke4
        • 2.Qg4#
      • 1...e4!
    • 1.Kc5?
      • 1...Ke4
        • 2.Ra4#
      • 1...e4!
    • 1.Sg3?
      • 1...Kf3
        • 2.Rf6#
      • 1...e4!
    • 1.Sh4?
      • threat
        • 2.Qf3#
      • 1...e4
        • 2.Sg6#
      • 1...Ke4!
    • 1.Ra3?
      • threat
        • 2.Qf3#
      • 1...Ke4
        • 2.Qf3#
      • 1...e4!
    • 1.Ra4?
      • 1...Ke4
        • 2.Kc5#
      • 1...e4!
    • 1.Ra5?
      • 1...e4
        • 2.Qg3#
      • 1...Ke4!
    • 1.Rd6?
      • 1...Ke4
        • 2.Qg4#
      • 1...e4!
    • 1.Rf6?
      • 1...Kg5
        • 2.Qh4#
      • 1...e4
        • 2.Qg3#
      • 1...Ke4!
    • 1.Rg6?
      • threat
        • 2.Qg4#
      • 1...e4
        • 2.Bc7#
      • 1...Ke4!
    • 1.Qg2?
      • 1...Kxf5
        • 2.Rf6#
        • 2.Qf3#
      • 1...e4!
    • 1.Qe3+?
      • 1...Kxf5
        • 2.Qf3#
      • 1...Kg4!
    • 1.Qg3+?
      • 1...Kxf5
        • 2.Qf3#
      • 1...Ke4!
    • 1.Qh4+?
      • 1...Kxf5
        • 2.Rf6#
      • 1...Kf3!
  • Keys
    • 1.Se7!
      • 1...Ke4
        • 2.Qe3#
      • 1...Kg5
        • 2.Sd5#
      • 1...e4
        • 2.Sg6#

This anticipates 280321(2024)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT,S_CUTP(b)::R(F)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::R(F)
      • Refutation
        • P(b);
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);SBLOCK::S(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(F);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Vars
        • K(a);P-FLIGHT,S_CUTP(b)::R(F)+K(C)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Vars
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(F);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(B)
        • P(b);SBLOCK::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(F);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);OGATEB,SBLOCK::B(G)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT,XS(D)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT,XS(D)::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT,XS(D)::R1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAR1(B)
      • K(a);N_GUARD,S_FLIGHT::B(G)+S(D)
      • P(b);SBLOCK::S(D)
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