MESON Chess Problem Database

Problem Display
PID: 236988 (2Q4B/KpN2pb1/1P3R2/2p2N2/pPkP3r/P1rp1P2/3p4/1R6 w - - 0 1)

Erokhin, Vladimir Alekseevich

Szachy, 1976

2Q4B/KpN2pb1/1P3R2/2p2N2/pPkP3r/P1rp1P2/3p4/1R6

#2

12 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Se3#
    • 1...cxb4
      • 2.Rxb4#
    • 1...cxd4
      • 2.Sd6#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qxc5#
      • 1...Kxb5
        • 2.Sd6#
      • 1...Kd5
        • 2.Se3#
      • 1...Bf8!
    • 1.Qf8?
      • threat
        • 2.Qxc5#
        • 2.Qxf7#
      • 1...Rxa3
        • 2.Qxc5#
      • 1...Rxd4
        • 2.Se3#
        • 2.Qxc5#
      • 1...cxb4
        • 2.Rxb4#
        • 2.Qxb4#
        • 2.Qc5#
        • 2.Qxf7#
      • 1...cxd4
        • 2.Sd6#
        • 2.Qc5#
        • 2.Qxf7#
      • 1...Rc1
        • 2.Qxc5#
      • 1...Rc2
        • 2.Qxc5#
      • 1...Rb3
        • 2.Qxc5#
      • 1...Re4
        • 2.Qxc5#
      • 1...Bxf8!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rxc5#
      • 1...Bxd4
        • 2.Sd6#
      • 1...bxc6
        • 2.Qa6#
      • 1...Bf8
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(f);SBLOCK,XP(E)::S(F)
    • P(g);OGATE,XP(D)::R1(A),XP(g)
    • P(g);SBLOCK,XP(E)::S(F)
  • Tries
    • Try
      • S(J);P_PINP(g)
      • Threat
        • QAR1(K),XP(g)
      • Vars
        • K(e);N_SPINP(g),S_FLIGHT,XS(J)::S(F)
        • K(e);N_SPINP(g),S_FLIGHT::S(F)
      • Refutation
        • B(j);
    • Try
      • Q(K);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(B)::QAR1(K),XP(g)
        • R(b);::QAR1(K),XP(g)
        • R(f);::QAR1(K),XP(g)
      • Refutation
        • B(j);XQ(K)
  • Actual
    • R(H);P_PINP(g)
    • Threat
      • R1(H),XP(g)
    • Vars
      • B(j);XP(E)::S(F)
      • P(h);N_SPINP(g),OGATE,XR(H)::QAB(K)
      • B(j);::S(F)
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