MESON Chess Problem Database

Problem Display
PID: 30247 (n3NR2/1np1p3/2B1k1N1/bp1p1p2/4r2p/4B2K/4Q3/8 w - - 0 1)

Kopyl, Valery Volodimirovich

Die Schwalbe, 2001

n3NR2/1np1p3/2B1k1N1/bp1p1p2/4r2p/4B2K/4Q3/8

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3+
      • 2.Qxe3#
    • 1...Ra4
      • 2.Bd4#
    • 1...Rb4
      • 2.Bd4#
    • 1...Rc4
      • 2.Bd4#
    • 1...Rd4
      • 2.Bxd4#
    • 1...Rf4
      • 2.Bxf4#
    • 1...Rg4
      • 2.Bf4#
    • 1...Re5
      • 2.Sf4#
    • 1...Sd6
      • 2.Sg7#
    • 1...d4
      • 2.Qa2#
    • 1...f4
      • 2.Qg4#
  • Tries
    • 1.Sf4+?
      • 1...Rxf4
        • 2.Bxf4#
      • 1...Ke5!
    • 1.Bd4?
      • threat
        • 2.Sf4#
      • 1...Re3+
        • 2.Qxe3#
      • 1...f4
        • 2.Sxf4#
        • 2.Qg4#
      • 1...Bd2!
    • 1.Bf4?
      • threat
        • 2.Sg7#
      • 1...Re3+
        • 2.Qxe3#
      • 1...Re5
        • 2.Qxe5#
      • 1...Bc3!
    • 1.Qd3?
      • threat
        • 2.Qxd5#
      • 1...Rxe3+
        • 2.Qxe3#
      • 1...Rd4
        • 2.Qxf5#
      • 1...Re5
        • 2.Sf4#
      • 1...d4
        • 2.Qb3#
      • 1...Sb6!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxf5#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Rf4
        • 2.Qxd5#
      • 1...Re5
        • 2.Sf4#
      • 1...Sd6
        • 2.Sg7#
      • 1...f4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XB(B)::QAR(A),XR(a)
    • R(a);OGATEB::QAR(A)+B(B)
    • R(a);OGATEB::QAR(A)+B(B),XR(a)
    • R(a);N_GUARD,SBLOCK::S(E)
    • S(h);SBLOCK::S(F)
    • P(e);OGATEB::QAB(A)
    • P(f);OGATEB::QAB(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(a);OGATE,XS(E)::QAR(A)+B(B),XR(a)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • B(B);P_PINR(a)
      • Threat
        • S(E)
      • Vars
        • R(a);CHECK,OGATEB::QAR(A),XR(a)
      • Refutation
        • B(c);
    • Try
      • B(B);P_PINR(a)
      • Threat
        • S(F)
      • Vars
        • R(a);CHECK,OGATEB::QAR(A),XR(a)
        • R(a);OGATE::QAR1(A),XR(a)
      • Refutation
        • B(c);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(e)
      • Vars
        • R(a);CHECK,OGATE,XB(B)::QAR(A),XR(a)
        • R(a);OGATE::QAB1(A),XP(f)
        • R(a);N_GUARD,SBLOCK::S(E)
        • P(e);OGATEB::QAB(A)
      • Refutation
        • S(k);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(f)
    • Vars
      • R(a);OGATE,P_PINQ(A),XB(B)::QAR(A),XR(a)
      • R(a);OGATE::QAB1(A),XP(e)
      • R(a);N_GUARD,SBLOCK::S(E)
      • S(h);SBLOCK::S(F)
      • P(f);OGATEB::QAB(A)
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