MESON Chess Problem Database

Problem Display
PID: 89855 (5r2/3N2q1/Bn6/b4p2/3R1p2/r3kP1R/p2pN1p1/B2Q2K1 w - - 0 1)

Yarmonov, Igor Petrovich

Die Schwalbe, 1997

5r2/3N2q1/Bn6/b4p2/3R1p2/r3kP1R/p2pN1p1/B2Q2K1

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Bxd4#
    • 1...Rc3
      • 2.Qxd2#
    • 1...Rd3
      • 2.Rxd3#
    • 1...Ra4
      • 2.Rd3#
    • 1...Bc3
      • 2.Rd3#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qe2#
      • 1...Bc3
        • 2.Rd3#
      • 1...Rc3!
    • 1.Sxf4?
      • threat
        • 2.Qe2#
      • 1...Qxd4
        • 2.Sxg2#
      • 1...Rc3
        • 2.Qxd2#
      • 1...Bc3!
    • 1.Bc3?
      • threat
        • 2.Rd3#
        • 2.Qxd2#
      • 1...Qxd4
        • 2.Bxd4#
      • 1...Qxd7
        • 2.Qxd2#
      • 1...Rxc3
        • 2.Qxd2#
      • 1...Bxc3
        • 2.Rd3#
      • 1...Qg3
        • 2.Rd3#
      • 1...a1Q
        • 2.Rd3#
      • 1...a1R
        • 2.Rd3#
      • 1...Sc4!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Rd3#
        • 2.Qxd2#
      • 1...Kxd4
        • 2.Qxd2#
      • 1...Qxd4
        • 2.Qe2#
      • 1...Qxd7
        • 2.Qxd2#
      • 1...Rxc3
        • 2.Qxd2#
      • 1...Bxc3
        • 2.Rd3#
      • 1...Qg3
        • 2.Rd3#
      • 1...Sc4
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(j);OGATE,XR(G)::B(A),XQ(j)
    • R(d);S_CUTB(g)::QAB1(B),XP(b)
    • R(d);N_GUARD::R1(G),XR(d)
    • R(d);N_GUARD::R1(G)
    • B(g);S_CUTR(d)::R1(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • B(g);S_CUTR(d)::R1(G)
      • Refutation
        • R(d);
    • Try
      • S(D);XP(f)
      • Threat
        • QAR1(B)
      • Vars
        • Q(j);N_GUARD,XR(G)::S(D),XP(c)
        • R(d);S_CUTB(g)::QAB1(B),XP(b)
      • Refutation
        • B(g);
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);OGATE,XR(G)::B(A),XQ(j)
        • Q(j);XS(I)::QAB1(B),XP(b)
        • R(d);XB(A)::QAB1(B),XP(b)
        • B(g);XB(A)::R1(G)
        • Q(j);::R1(G)
        • P(a);P_PINQ(B)::R1(G)
      • Refutation
        • S(i);
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(e);P_SPINP(b),S_FLIGHT,XR(G)::QAR2(B),XP(b)
      • Q(j);SBLOCK,XR(G)::QAR1(B)
      • Q(j);XS(I)::QAB1(B),XP(b)
      • R(d);XS(D)::QAB1(B),XP(b)
      • B(g);XS(D)::R1(G)
      • Q(j);::R1(G)
      • S(i);N_GUARD::S(D)
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