MESON Chess Problem Database

Problem Display
PID: 66153 (3K3b/3R4/NP1Q4/q2P4/rppkpP1p/1pN5/1PPPB1n1/2BRr2b w - - 0 1)

Sovik, Stefan

4th Place, 01. WCCT, 1972-1975

3K3b/3R4/NP1Q4/q2P4/rppkpP1p/1pN5/1PPPB1n1/2BRr2b

#2

14 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb6+
      • 2.Qxb6#
    • 1...Qb5
      • 2.Sxb5#
    • 1...Qc5
      • 2.Qxc5#
    • 1...Qxd5
      • 2.Sb5#
      • 2.Qc5#
      • 2.Qxd5#
    • 1...Rxe2
      • 2.Sxe2#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bf6+
      • 2.Qxf6#
    • 1...Se3
      • 2.dxe3#
    • 1...bxc3
      • 2.dxc3#
    • 1...e3
      • 2.dxe3#
  • Tries
    • 1.Re7?
      • threat
        • 2.Rxe4#
      • 1...Qxb6+
        • 2.Qxb6#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...bxc3
        • 2.dxc3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Se3
        • 2.dxe3#
      • 1...e3
        • 2.Re4#
        • 2.dxe3#
      • 1...Sxf4!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Rxc4#
      • 1...Bf6+
        • 2.Qxf6#
      • 1...Qxb6
        • 2.Qxb6#
      • 1...Qxa6
        • 2.Qc5#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...bxc3
        • 2.dxc3#
      • 1...Qb5
        • 2.Sxb5#
      • 1...Qc5
        • 2.Qxc5#
      • 1...Se3
        • 2.dxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(k);CHECK,OGATE,XP(K)::QAB(L),XQ(k)
    • Q(k);N_GUARD,N_PINP(K)::S(G),XQ(k)
    • Q(k);N_GUARD,N_PINP(K)::QAB1(L),XQ(k)
    • R(a);XB(F)::S(G),XR(a)
    • B(l);N_GUARD::QAB1(L),XB(l)
    • B(l);CHECK,N_GUARD::QAB(L),XB(l)
    • S(c);OGATE::R(B)+P(E)DCHECK,XS(c)
    • P(f);OGATE,XS(G)::R(B)+P(E)DCHECK,XP(f)
    • P(i);OGATE::R(B)+P(E)DCHECK,XP(i)
  • Tries
    • Try
      • R(M);
      • Threat
        • R1(M),XP(i)
      • Vars
        • Q(k);CHECK,OGATE,XP(K)::QAB(L),XQ(k)
        • R(a);XB(F)::S(G),XR(a)
        • P(f);OGATE,XS(G)::R(B)+P(E)DCHECK,XP(f)
        • B(l);N_GUARD::QAB1(L),XB(l)
        • B(l);N_GUARD,P_PINR(M)::QAB(L),XB(l)
        • S(c);OGATE::R(B)+P(E)DCHECK,XS(c)
      • Refutation
        • S(c);XP(H)
  • Actual
    • R(M);N_SPINP(K)
    • Threat
      • R1(M),XP(g)
    • Vars
      • B(l);CHECK,N_GUARD::QAB(L),XB(l)
      • Q(k);OGATE,P_PINR(M),XP(K)::QAB(L),XQ(k)
      • Q(k);N_GUARD,XS(J)::QAB1(L)
      • R(a);XB(F)::S(G),XR(a)
      • P(f);OGATE,XS(G)::R(B)+P(E)DCHECK,XP(f)
      • Q(k);N_GUARD::S(G),XQ(k)
      • Q(k);N_GUARD::QAB1(L),XQ(k)
      • S(c);OGATE::R(B)+P(E)DCHECK,XS(c)
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