MESON Chess Problem Database

Problem Display
PID: 232687 (3K2b1/2PR1N2/7Q/2rnp3/1P1k2p1/3P2P1/BPRrPbn1/2B3N1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Freie Presse, 1993

3K2b1/2PR1N2/7Q/2rnp3/1P1k2p1/3P2P1/BPRrPbn1/2B3N1

#2

14 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Rxd5#
    • 1...Rc3
      • 2.Rxd5#
      • 2.bxc3#
    • 1...Rc4
      • 2.Rxc4#
    • 1...Ra5
      • 2.Rc4#
    • 1...Rb5
      • 2.Rc4#
    • 1...Rc6
      • 2.Rxd5#
    • 1...Rxc7
      • 2.Rxd5#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qxc5#
        • 2.Qxe5#
      • 1...Ke3
        • 2.Qxc5#
        • 2.Qxe5#
      • 1...Rdxc2
        • 2.Qxe5#
      • 1...Rxd3
        • 2.Qxe5#
      • 1...Rcxc2
        • 2.Qxe5#
      • 1...Rxc7
        • 2.Qxe5#
      • 1...Bxg3
        • 2.Qxc5#
      • 1...Bxf7
        • 2.Qxc5#
      • 1...Rc3
        • 2.Qxe5#
      • 1...Rc4
        • 2.Qxe5#
      • 1...Ra5
        • 2.Qxe5#
      • 1...Rb5
        • 2.Qxe5#
      • 1...Rc6
        • 2.Qxe5#
      • 1...e4
        • 2.Qxc5#
      • 1...Rxe2!
    • 1.Qg6?
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qe4#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...e4
        • 2.Qxe4#
      • 1...Bh7!
    • 1.Qh7?
      • threat
        • 2.Qe4#
      • 1...Ke3
        • 2.Qe4#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...Rxd3
        • 2.Qxd3#
      • 1...e4
        • 2.Qxe4#
      • 1...Bxh7!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qxc5#
      • 1...Ke3
        • 2.Qxc5#
      • 1...Rxc2
        • 2.Rxd5#
      • 1...Rxe2
        • 2.Rxd5#
      • 1...Rxd3
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(f);N_GUARD,XR(E)::R1(L),XS(g)
    • R(f);N_GUARD::R1(E),XR(f)
    • R(f);N_GUARD::R1(E)
    • R(f);N_GUARD::R1(L),XS(g)
    • R(f);N_GUARD,XP(K)::R1(L),XS(g)
  • Tries
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XR(E)::QAB1(J),XP(h)
        • R(a);XP(G)::QAB1(J),XP(h)
        • R(f);XR(E)::QAB1(J),XP(h)
        • R(f);XP(K)::QAB1(J),XP(h)
        • B(b);XP(H)::QAB1(J),XR(f)
        • B(i);XS(M)::QAB1(J),XR(f)
        • R(f);::QAB1(J),XP(h)
        • P(h);::QAB1(J),XR(f)
      • Refutation
        • R(a);XP(F)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • K(d);N_SPINS(g),P_SPINR(a),S_FLIGHT::QAR1(J)
        • R(a);XP(F)::S(B),XR(a)
        • R(a);OGATE,XP(G)::QAR1(J),XR(a)
        • P(h);::QAR1(J),XP(h)
      • Refutation
        • B(i);
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • K(d);N_SPINS(g),P_SPINR(a),S_FLIGHT::QAR1(J)
        • R(a);XP(F)::S(B),XR(a)
        • R(a);OGATE,XP(G)::QAR1(J),XR(a)
        • P(h);::QAR1(J),XP(h)
      • Refutation
        • B(i);XQ(J)
  • Actual
    • Q(J);P_PINR(f)
    • Threat
      • QAB1(J),XR(f)
    • Vars
      • K(d);N_SPINR(f),N_SPINS(g),P_SPINR(a),S_FLIGHT::QAB(J),XR(f)
      • R(a);XR(E)::R1(L),XS(g)
      • R(a);XP(F)::R1(L),XS(g)
      • R(a);XP(G)::R1(E)
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