MESON Chess Problem Database
Problem Display
PID: 148030 (2br3q/b5nN/r7/6Q1/2P1k3/n1P4B/4K1R1/1N4B1 w - - 0 1)
Keller, Kurt
Rochade Europa, 1993
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Sf6#
- 1...Ra5
- 2.Sf6#
- 1...Rb6
- 2.Qe3#
- 1...Re6
- 2.Rg4#
- 1...Rf6
- 2.Sxf6#
- 1...Rd2+
- 2.Sxd2#
- 1...Rd4
- 2.Qe3#
- 1...Rd7
- 2.Rg4#
- 1...Re8
- 2.Sd2#
- 1...Rf8
- 2.Sd2#
- 1...Rg8
- 2.Sd2#
- 1...Be3
- 2.Qxe3#
- 1...Bd4
- 2.Sd2#
- 1...Bb6
- 2.Sf6#
- 1...Bb8
- 2.Qe3#
- 1...Bg4+
- 2.Rxg4#
- 1...Be6
- 2.Sf6#
- 1...Bb7
- 2.Rg4#
- 1...Bd7
- 2.Sd2#
- 1...Se6
- 2.Qf5#
- 1...Ra4
- Tries
- 1.Bd4?
- threat
- 2.Sd2#
- 2.Qe3#
- 2.Qe5#
- 1...Bg4+
- 2.Rxg4#
- 2.Qxg4#
- 1...Rxd4
- 2.Qe3#
- 1...Bxd4
- 2.Sd2#
- 1...Bxh3
- 2.Sd2#
- 2.Qe5#
- 1...Sxb1
- 2.Qe3#
- 2.Qe5#
- 1...Qe8
- 2.Sd2#
- 2.Qe3#
- 1...Ra5
- 2.Sd2#
- 2.Sf6#
- 2.Qe3#
- 1...Re6
- 2.Sd2#
- 2.Rg4#
- 2.Qe3#
- 2.Qh4#
- 2.Qg4#
- 1...Rd5
- 2.Sd2#
- 2.Qe3#
- 1...Re8
- 2.Sd2#
- 2.Qe3#
- 1...Bb8
- 2.Sd2#
- 2.Qe3#
- 1...Bf5
- 2.Sd2#
- 2.Qe3#
- 1...Sc2
- 2.Sd2#
- 2.Qe5#
- 1...Sf5
- 2.Sd2#
- 2.Rg4#
- 2.Qg4#
- 1...Sh5
- 2.Sd2#
- 2.Qe3#
- 1...Se6
- 2.Sd2#
- 2.Bf5#
- 2.Qe3#
- 2.Qf5#
- 1...Se8
- 2.Sd2#
- 2.Qe3#
- 1...Sxc4!
- threat
- 1.Bb6?
- threat
- 2.Sf6#
- 2.Qe3#
- 1...Rd2+
- 2.Sxd2#
- 1...Bg4+
- 2.Rxg4#
- 1...Qxh7
- 2.Qe3#
- 1...Rxb6
- 2.Qe3#
- 1...Bxb6
- 2.Sf6#
- 1...Bxh3
- 2.Sf6#
- 1...Sxc4
- 2.Sf6#
- 1...Bf5
- 2.Qe3#
- 1...Qf8
- 2.Qe3#
- 1...Rd3
- 2.Sf6#
- 1...Rd6
- 2.Qe3#
- 1...Rf8
- 2.Sd2#
- 2.Qe3#
- 1...Sc2
- 2.Sf6#
- 1...Sh5
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 2.Qf5#
- 1...Se8
- 2.Qe3#
- 1...Sf5!
- threat
- 1.Qh4+?
- 1...Ke5
- 2.Bh2#
- 1...Bg4+!
- 1...Ke5
- 1.Qg4+?
- 1...Ke5
- 2.Bh2#
- 1...Bxg4+!
- 1...Ke5
- 1.Qd5+?
- 1...Kf4
- 2.Bh2#
- 1...Rxd5!
- 1...Kf4
- 1.Bd4?
- Keys
- 1.Bd7!
- threat
- 2.Sd2#
- 2.Rg4#
- 1...Rxd7
- 2.Rg4#
- 1...Bxd7
- 2.Sd2#
- 1...Sxb1
- 2.Rg4#
- 1...Sxc4
- 2.Rg4#
- 1...Sf5
- 2.Qxf5#
- 1...Qf8
- 2.Sd2#
- 1...Rd6
- 2.Rg4#
- 1...Rf6
- 2.Sd2#
- 2.Sxf6#
- 1...Rf8
- 2.Sd2#
- 1...Be3
- 2.Qxe3#
- 1...Bb8
- 2.Sd2#
- 2.Qe3#
- 1...Sh5
- 2.Sd2#
- 2.Qf5#
- 1...Se6
- 2.Sd2#
- threat
- 1.Bd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 15
- Sets
- R(c);N_GUARD::S(I)
- R(c);S_CUTB(d)::QAR1(H)
- R(c);S_CUTB(f)::R(D)
- R(c);N_GUARD::S(I),XR(c)
- R(g);CHECK,N_GUARD::S(A),XR(g)
- R(g);S_CUTB(d)::QAR1(H)
- R(g);S_CUTB(f)::R(D)
- R(g);N_GUARD::S(A)
- B(d);N_GUARD::QAR1(H),XB(d)
- B(d);S_CUTR(g)::S(A)
- B(d);S_CUTR(c)::S(I)
- B(d);N_GUARD::QAR1(H)
- B(f);CHECK,N_GUARD::R(D),XB(f)
- B(f);S_CUTR(c)::S(I)
- B(f);N_GUARD::R(D)
- B(f);S_CUTR(g)::S(A)
- S(e);N_GUARD,S_CUTB(f)::QAB1(H)
- Tries
- Try
- B(B);
- Threat
- DUALS(3)
- Vars
- R(g);XB(B)::QAR1(H)
- B(d);XB(B)::S(A)
- Refutation
- S(a);XP(G)
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- R(g);CHECK,N_GUARD::S(A),XR(g)
- B(f);CHECK,N_GUARD::R(D),XB(f)
- Q(h);XS(I)::QAR1(H)
- R(c);XB(B)::QAR1(H)
- B(d);XB(B)::S(I)
- B(f);XB(F)::S(I)
- S(a);XP(G)::S(I)
- B(f);::QAR1(H)
- Q(h);::QAR1(H)
- R(g);::S(I)
- R(g);::QAR1(H)
- S(a);::S(I)
- S(e);::QAR1(H)
- Refutation
- S(e);
- Try
- Q(H);CHECK
- Vars
- K(b);P-FLIGHT::B(B)
- Refutation
- B(f);CHECK,P_SPINB(f)
- Try
- Q(H);CHECK
- Vars
- K(b);P-FLIGHT::B(B)
- Refutation
- B(f);CHECK,XQ(H)
- Try
- Q(H);CHECK
- Vars
- K(b);P-FLIGHT::B(B)
- Refutation
- R(g);XQ(H)
- Try
- Actual
- B(F);
- Threat
- DUALS(2)
- Vars
- R(g);XB(F)::R(D)
- B(f);XB(F)::S(A)
- S(a);XS(A)::R(D)
- S(a);XP(G)::R(D)
- S(e);N_GUARD::QAB1(H),XS(e)
- Q(h);::S(A)
- R(c);::R(D)
- R(g);::S(A)
- B(d);N_GUARD::QAR1(H),XB(d)
- S(e);::S(A)
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