MESON Chess Problem Database

Problem Display
PID: 276195 (2N2N2/8/P3Bp2/R1ppkppR/8/4K2b/8/1n2Q2n w - - 0 1)

Fomichev, Evgeny Vasilevich

Pat a Mat, 1990

2N2N2/8/P3Bp2/R1ppkppR/8/4K2b/8/1n2Q2n

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Rxd5#
    • 1...d4+
      • 2.Kf3#
    • 1...f4+
      • 2.Kd3#
    • 1...g4
      • 2.Rxf5#
  • Tries
    • 1.Bd7?
      • threat
        • 2.Sg6#
      • 1...f4+
        • 2.Kd3#
      • 1...d4+!
    • 1.Bf7?
      • threat
        • 2.Sg6#
        • 2.Sd7#
      • 1...d4+
        • 2.Kf3#
      • 1...f4+!
    • 1.Bg8?
      • threat
        • 2.Sg6#
        • 2.Sd7#
      • 1...d4+
        • 2.Kf3#
      • 1...f4+!
    • 1.Rxc5?
      • threat
        • 2.Rxd5#
      • 1...f4+
        • 2.Kd3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Bg2!
    • 1.Qc3+?
      • 1...d4+
        • 2.Qxd4#
      • 1...Sxc3!
    • 1.Qg3+?
      • 1...f4+
        • 2.Qxf4#
      • 1...Sxg3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb8#
      • 1...d4+
        • 2.Qxd4#
      • 1...f4+
        • 2.Qxf4#
      • 1...cxb4
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • P(d);OGATE,P_SPINP(e)::R1(C),XP(e)
    • P(e);CHECK,P_SPINP(d),SBLOCK::QAR(A)+K(B)
    • P(g);CHECK,P_SPINP(h),SBLOCK::QAR(A)+K(B)
    • P(h);OGATE,P_SPINP(g)::R1(D),XP(g)
  • Tries
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • P(g);CHECK,P_SPINP(h),SBLOCK::QAR(A)+K(B)
      • Refutation
        • P(e);CHECK,P_SPINP(d)
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);CHECK,P_SPINP(d),SBLOCK::QAR(A)+K(B)
      • Refutation
        • P(g);CHECK,P_SPINP(h)
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);CHECK,P_SPINP(d),SBLOCK::QAR(A)+K(B)
      • Refutation
        • P(g);CHECK,P_SPINP(h)
    • Try
      • R(C);P_PINP(e),XP(d)
      • Threat
        • R1(C),XP(e)
      • Vars
        • P(g);CHECK,SBLOCK::QAR(A)+K(B)
        • S(a);N_GUARD::QAB(A),XS(a)
      • Refutation
        • B(c);
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);CHECK,P_SPINP(e),S_CUTP(d)::QAB1(A),XP(e)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • P(g);CHECK,P_SPINP(g),S_CUTP(h)::QAB1(A),XP(g)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(e);CHECK,P_SPINP(d)::QAB1(A),XP(e)
      • P(g);CHECK,P_SPINP(h)::QAB1(A),XP(g)
      • P(d);OGATE,P_SPINP(e),XQ(A)::R1(C),XP(e)
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