MESON Chess Problem Database

Problem Display
PID: 12061 (8/8/8/5K2/7N/bR6/4k3/4B2Q w - - 0 1)

Nagovitsin, Eduard Nikolaevich

1st HM., Lokker MT, 1974

8/8/8/5K2/7N/bR6/4k3/4B2Q

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3310 2345 Chess Problems 1997
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Bd2?
      • threat
        • 2.Qe1#
      • 1...Kf2
        • 2.Qg2#
        • 2.Qe1#
      • 1...Kxd2!
    • 1.Bb4?
      • threat
        • 2.Qf3#
        • 2.Qe1#
      • 1...Kf2
        • 2.Qg2#
        • 2.Qe1#
      • 1...Bxb4!
    • 1.Ba5?
      • threat
        • 2.Qf3#
        • 2.Qe1#
      • 1...Kf2
        • 2.Qg2#
        • 2.Qe1#
      • 1...Bb4!
    • 1.Rb1?
      • threat
        • 2.Qf3#
      • 1...Kd3
        • 2.Qe4#
      • 1...Ke3
        • 2.Qe4#
      • 1...Bc1!
    • 1.Rb2+?
      • 1...Kd1
        • 2.Bf2#
        • 2.Bc3#
        • 2.Bg3#
        • 2.Bb4#
        • 2.Ba5#
      • 1...Kd3
        • 2.Qe4#
      • 1...Ke3
        • 2.Qe4#
      • 1...Bxb2!
    • 1.Re3+?
      • 1...Kxe3
        • 2.Qe4#
      • 1...Kd1!
    • 1.Qg2+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kxe1!
    • 1.Qh2+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf1
        • 2.Qf2#
      • 1...Kxe1!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qf3#
      • 1...Kf2
        • 2.Qe1#
      • 1...Kd3
        • 2.Qe4#
      • 1...Ke3
        • 2.Qf3#

This anticipates 45710(1975)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Refutation
        • B(b);XB(A)
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Refutation
        • B(b);
    • Try
      • R(C);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • B(b);
    • Try
      • R(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • B(b);XR(C)
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XR(C)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
  • Actual
    • B(A);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);P-FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
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