MESON Chess Problem Database

Problem Display
PID: 62525 (rb5q/B3N3/pR1p1p2/K2R1Q1r/2B4p/1P2k3/5pP1/nN4n1 w - - 0 1)

Udartsev, Valentin Filipovich

Zigalov, Aleksandr

Themes-64, 1986

rb5q/B3N3/pR1p1p2/K2R1Q1r/2B4p/1P2k3/5pP1/nN4n1

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb3+
      • 2.Rxb3#
    • 1...Se2
      • 2.Rd3#
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sh3
      • 2.Qf3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sf1#
        • 2.Qe4#
      • 1...Sxb3+
        • 2.Rxb3#
      • 1...f1Q
        • 2.Sxf1#
      • 1...f1S
        • 2.Sxf1#
      • 1...f1B
        • 2.Sxf1#
      • 1...f1R
        • 2.Sxf1#
      • 1...Qh7
        • 2.Sf1#
      • 1...Rxf5!
    • 1.Bf1?
      • threat
        • 2.Rd3#
      • 1...Sxb3+
        • 2.Rxb3#
      • 1...Rxf5!
    • 1.Rbxd6+?
      • 1...Bxa7
        • 2.Re6#
      • 1...Rxa7!
    • 1.Qg4?
      • threat
        • 2.Qd4#
      • 1...Rxd5+
        • 2.Sxd5#
      • 1...Sxb3+
        • 2.Rxb3#
      • 1...Se2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...f5
        • 2.Rd3#
      • 1...Sc2!
    • 1.Qxf2+?
      • 1...Ke4
        • 2.Sd2#
        • 2.Sc3#
        • 2.Bd3#
        • 2.Qd4#
      • 1...Kxf2!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Re4#
      • 1...Rxf5+
        • 2.Sxf5#
      • 1...Sxb3+
        • 2.Rxb3#
      • 1...Kxd4
        • 2.Rxd6#
      • 1...d5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(a);CHECK,OGATE,XP(C)::B(I)+R(H),DCHECK,XS(a)
    • S(b);N_GUARD::QAR1(G),XS(b)
    • S(b);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,OGATE,XP(C)::B(I)+R(H),DCHECK,XS(a)
        • P(c);::S(A),XQ(c)
        • P(c);::S(A),XS(c)
        • P(c);::S(A),XB(c)
        • P(c);::S(A),XR(c)
        • Q(l);::S(A)
      • Refutation
        • R(f);P_PINR(F),XQ(G)
    • Try
      • B(D);
      • Threat
        • R1(F)
      • Vars
        • S(a);CHECK,OGATE,XP(C)::B(I)+R(H),DCHECK,XS(a)
      • Refutation
        • R(f);P_PINR(F),XQ(G)
    • Try
      • R(H);CHECK,XP(h)
      • Vars
        • B(k);XB(I)::R(H)
      • Refutation
        • R(j);XB(I)
    • Try
      • Q(G);P_SPINR(F)
      • Threat
        • QAB1(G)
      • Vars
        • R(f);CHECK,XR(F)::S(J),XR(f)
        • S(a);CHECK,OGATE,XP(C)::B(I)+R(H),DCHECK,XS(a)
        • S(b);N_GUARD::QAR1(G)
        • S(b);N_GUARD::QAR1(G),XS(b)
        • P(i);N_PINR(F)::R1(F)
      • Refutation
        • S(a);
    • Try
      • Q(G);CHECK,P_SPINR(F),XP(c)
      • Refutation
        • K(d);S_FLIGHT,XQ(G)
  • Actual
    • R(F);P_SPINQ(G)
    • Threat
      • R1(F)
    • Vars
      • R(f);CHECK,XQ(G)::S(J),XR(f)
      • S(a);CHECK,OGATE,XP(C)::R(H),XS(a)
      • K(d);OGATEB,S_FLIGHT,XR(F)::B(I)+R(H),DCHECK,XP(h)
      • P(h);N_PINQ(G)::QAR1(G)
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