MESON Chess Problem Database

Problem Display
PID: 260580 (8/8/p7/2p1R3/R1KP2k1/Q7/7P/7n w - - 0 1)

Nagovitsin, Eduard Nikolaevich

64 Shakhmatnoe obozrenie, 2022

8/8/p7/2p1R3/R1KP2k1/Q7/7P/7n

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
  • Tries
    • 1.Kxc5?
      • threat
        • 2.d5#
      • 1...Kh4
        • 2.d5#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...Kf4!
    • 1.Kd5?
      • threat
        • 2.dxc5#
      • 1...Kf4
        • 2.dxc5#
      • 1...Kh4
        • 2.dxc5#
      • 1...cxd4
        • 2.Rxd4#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...c4!
    • 1.Qf3+?
      • 1...Kh4
        • 2.Rh5#
        • 2.Qh5#
      • 1...Kxf3!
    • 1.Qh3+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxh3!
    • 1.h3+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kh4!
    • 1.d5?
      • threat
        • 2.Kxc5#
      • 1...Kh4
        • 2.Kxc5#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#
      • 1...Kf4!
  • Keys
    • 1.dxc5!
      • threat
        • 2.Kd5#
      • 1...Kf4
        • 2.Kd5#
      • 1...Kh4
        • 2.Kd5#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf2
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(c)
      • Threat
        • R(C)+P(E)
      • Vars
        • K(b);P-FLIGHT::R(C)+P(E)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Threat
        • R(C)+P(E),XP(c)
      • Vars
        • K(b);P-FLIGHT::R(C)+P(E),XP(c)
        • P(c);OGATE,P_SPINP(c),XP(E)::R(C),XP(c)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • P(A);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(E);
      • Threat
        • R(C)+K(D),XP(c)
      • Vars
        • K(b);P-FLIGHT::R(C)+K(D),XP(c)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • P(E);XP(c)
    • Threat
      • R(C)+K(D)
    • Vars
      • K(b);P-FLIGHT::R(C)+K(D)
      • S(a);N_GUARD::QAR1(B),XS(a)
      • S(a);N_GUARD::QAR1(B)
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