MESON Chess Problem Database

Problem Display
PID: 157947 (2R1r3/7Q/1N6/3B4/1P1k1B1b/r5p1/2P1b3/2n3K1 w - - 0 1)

Antonov, Yuri Mikhailovich

Shakhmaty v SSSR, 1973

2R1r3/7Q/1N6/3B4/1P1k1B1b/r5p1/2P1b3/2n3K1

#2

8 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.c3#
    • 1...Ra2
      • 2.c3#
    • 1...Rd3
      • 2.Rc4#
    • 1...Ra4
      • 2.c3#
    • 1...Ra5
      • 2.c3#
    • 1...Ra6
      • 2.c3#
    • 1...Ra7
      • 2.c3#
    • 1...Ra8
      • 2.c3#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rd8
      • 2.Qe4#
    • 1...Rf8
      • 2.Qe4#
    • 1...Rg8
      • 2.Qe4#
    • 1...Rh8
      • 2.Qe4#
    • 1...Bd1
      • 2.Rc4#
    • 1...Bf3
      • 2.Rc4#
    • 1...Bc4
      • 2.Rxc4#
    • 1...Bg4
      • 2.Rc4#
    • 1...Bh5
      • 2.Rc4#
    • 1...Be7
      • 2.Qe4#
    • 1...Sb3
      • 2.c3#
    • 1...Sd3
      • 2.Rc4#
  • Tries
    • 1.Qd3+?
      • 1...Rxd3
        • 2.Rc4#
      • 1...Sxd3
        • 2.Rc4#
      • 1...Bxd3!
    • 1.Qg7+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Bf6!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qc5#
      • 1...Rxc8
        • 2.Qe5#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Ra5
        • 2.Qc3#
      • 1...Be7
        • 2.Qe5#
      • 1...Sb3
        • 2.Qc3#
      • 1...Sd3
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 16
  • Sets
    • R(c);N_GUARD::P(B)
    • R(c);S_CUTB(b)::R1(H)
    • R(g);N_GUARD::QAR1(G),XR(g)
    • R(g);N_GUARD::QAR1(G)
    • B(b);N_GUARD::R1(H)
    • B(b);N_GUARD::R1(H),XB(b)
    • B(f);S_CUTR(g)::QAR1(G)
    • S(a);S_CUTR(c)::P(B)
    • S(a);S_CUTB(b)::R1(H)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • R(c);XQ(G)::R1(H)
        • S(a);XQ(G)::R1(H)
      • Refutation
        • B(b);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAB1(G),XR(g)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • R(g);N_GUARD,XR(H)::QAB1(G)
      • B(b);N_GUARD::QAR1(G),XB(b)
      • R(c);N_GUARD::QAB1(G),XR(c)
      • R(c);N_GUARD::QAB1(G)
      • B(f);S_CUTR(g)::QAB1(G)
      • S(a);S_CUTR(c)::QAB1(G)
      • S(a);S_CUTB(b)::QAR1(G)
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