MESON Chess Problem Database

Problem Display
PID: 198518 (K1R3B1/5q2/8/p1N2r2/P1kP3R/P1Np1p2/4b3/2Q5 w - - 0 1)

van Gool, Johann Christoffel

5th HM., Gevers MT, 1983

K1R3B1/5q2/8/p1N2r2/P1kP3R/P1Np1p2/4b3/2Q5

#2

10 + 7

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5+
      • 2.Sxd5#
    • 1...Rxc5
      • 2.Bxf7#
    • 1...Rd5
      • 2.Sb1#
      • 2.Sd1#
      • 2.Sa2#
      • 2.Sxe2#
      • 2.Sb5#
    • 1...Re5
      • 2.dxe5#
  • Tries
    • 1.Sb3+?
      • 1...Rc5
        • 2.Sd2#
        • 2.Sxa5#
        • 2.Bxf7#
      • 1...Kxb3!
    • 1.S5e4+?
      • 1...Kb3
        • 2.Sd2#
      • 1...Rc5
        • 2.Sd2#
      • 1...Kxd4!
    • 1.Sa6+?
      • 1...Rc5
        • 2.Bxf7#
      • 1...Kb3!
    • 1.Sb7+?
      • 1...Rc5
        • 2.Sxa5#
        • 2.Bxf7#
      • 1...Kb3!
    • 1.Sd7+?
      • 1...Rc5
        • 2.Bxf7#
      • 1...Kb3!
    • 1.Bxf7+?
      • 1...Rd5
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Sxe2#
        • 2.Sb5#
        • 2.Sxd5#
        • 2.Bxd5#
      • 1...Rxf7!
    • 1.Qb2?
      • threat
        • 2.Qb3#
      • 1...Qd5+
        • 2.Sb7#
      • 1...Rxc5
        • 2.Bxf7#
        • 2.Rxc5#
        • 2.dxc5#
      • 1...Rf4
        • 2.Sb3#
      • 1...Bd1!
    • 1.Qd1?
      • threat
        • 2.Qb3#
      • 1...Qd5+
        • 2.Sb7#
      • 1...Kxc3
        • 2.Qc1#
      • 1...Rxc5
        • 2.Rxc5#
      • 1...Rf4
        • 2.Sb3#
      • 1...Bxd1!
    • 1.Qc2?
      • threat
        • 2.Qb3#
      • 1...Qd5+
        • 2.Sb7#
      • 1...Rxc5
        • 2.Bxf7#
        • 2.Rxc5#
        • 2.dxc5#
      • 1...Rf4
        • 2.Sb3#
      • 1...Bd1
        • 2.Qxd3#
      • 1...dxc2!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qb3#
      • 1...Qd5+
        • 2.Sb7#
      • 1...Kxc3
        • 2.Qc1#
      • 1...Rxc5
        • 2.Rxc5#
      • 1...Rf4
        • 2.Sb3#
      • 1...Bd1
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(g);CHECK::QAR(A)+S(C),XQ(g)
    • R(f);N_GUARD,P_SPINR(f),XS(G)::B(J),XQ(g)
    • R(f);OGATE::R(F)+P(E),XR(f)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • K(d);S_FLIGHT,XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);S_FLIGHT::S(G)
        • R(f);P_SPINR(f)::S(G)
      • Refutation
        • K(d);N_SPINQ(g),P-FLIGHT,XP(E)
    • Try
      • S(G);CHECK
      • Vars
        • R(f);P_SPINR(f)::B(J),XQ(g)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • R(f);P_SPINR(f)::B(J),XQ(g)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(J);CHECK,XQ(g)
      • Refutation
        • R(f);XB(J)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(g);CHECK,S_CUTR(f)::R(I)+S(G)
        • R(f);N_GUARD::R(I)+S(G)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(g);CHECK,S_CUTR(f)::R(I)+S(G)
        • K(d);N_SPINQ(g),OGATEB,P-FLIGHT,XS(C)::QAR2(A)
        • R(f);OGATE,P_SPINR(f),XS(G)::R1(I),XR(f)
        • R(f);N_GUARD::R(I)+S(G)
      • Refutation
        • B(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(g);CHECK,S_CUTR(f)::R(I)+S(G)
        • R(f);N_GUARD::R(I)+S(G)
        • B(a);N_GUARD::QAB1(A),XP(b)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(g);CHECK,S_CUTR(f)::R(I)+S(G)
      • K(d);N_SPINQ(g),OGATEB,P-FLIGHT,XS(C)::QAR2(A)
      • R(f);OGATE,P_SPINR(f),XS(G)::R1(I),XR(f)
      • R(f);N_GUARD::R(I)+S(G)
      • B(a);N_GUARD::QAB1(A),XP(b)
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