MESON Chess Problem Database
Problem Display
PID: 143214 (1NR5/4pK2/Bp2np2/2Pk2p1/1rNP4/pp3P2/7Q/6B1 w - - 0 1)
Witt, Andreas
The Problemist, 2011
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra4
- 2.Sxb6#
- 1...Rxc4
- 2.Bb7#
- 1...Sxd4
- 2.Se3#
- 1...Sf4
- 2.Rd8#
- 1...Sc7
- 2.Rd8#
- 1...Sg7
- 2.Rd8#
- 1...Sd8+
- 2.Rxd8#
- 1...b5
- 2.Sb6#
- 1...f5
- 2.Qe5#
- 1...Ra4
- Tries
- 1.Kxe7?
- threat
- 2.Qd6#
- 1...b5
- 2.Sb6#
- 1...Sf4
- 2.Rd8#
- 1...Rb5!
- threat
- 1.Sc6?
- threat
- 2.Se3#
- 2.Sxb4#
- 2.Sxe7#
- 1...Rxc4
- 2.Sxe7#
- 1...Sxd4
- 2.Sxb4#
- 2.Sxe7#
- 1...bxc5
- 2.Se3#
- 2.Sxe7#
- 1...Rb5
- 2.Se3#
- 1...Sc7
- 2.Sxb4#
- 2.Sxe7#
- 1...b5
- 2.Se3#
- 2.Sb6#
- 1...Ra4
- 2.Se3#
- 2.Sxb6#
- 2.Sxe7#
- 1...Sd8+!
- threat
- 1.Bb5?
- threat
- 2.Sxb6#
- 1...Sd8+
- 2.Rxd8#
- 1...Rxc4
- 2.Bc6#
- 1...bxc5
- 2.Sb6#
- 1...Rxb5!
- threat
- 1.Qf4?
- threat
- 2.Se3#
- 2.Qe4#
- 2.Qf5#
- 1...Sd8+
- 2.Rxd8#
- 1...Rxc4
- 2.Bb7#
- 2.Qe4#
- 2.Qf5#
- 1...Sxd4
- 2.Se3#
- 2.Qxd4#
- 2.Qe4#
- 1...Sxf4
- 2.Rd8#
- 1...Sxc5
- 2.Se3#
- 1...Rb5
- 2.Se3#
- 1...b5
- 2.Se3#
- 2.Sb6#
- 1...Sc7
- 2.Se3#
- 2.Rd8#
- 2.Qe4#
- 1...Sg7
- 2.Se3#
- 2.Rd8#
- 2.Qe4#
- 1...Sf8
- 2.Se3#
- 2.Qe4#
- 1...f5
- 2.Se3#
- 2.Qe5#
- 2.Qxf5#
- 1...gxf4!
- threat
- 1.Qc7?
- threat
- 2.Qc6#
- 2.Qb7#
- 2.Qd7#
- 1...Sd8+
- 2.Rxd8#
- 2.Qxd8#
- 1...Sxd4
- 2.Se3#
- 2.Rd8#
- 2.Qd8#
- 2.Qd7#
- 1...Sxc5
- 2.Qc6#
- 1...Sxc7
- 2.Rd8#
- 1...bxc5
- 2.Qc6#
- 2.Qd7#
- 1...b5
- 2.Sb6#
- 1...Sf8
- 2.Qc6#
- 2.Qb7#
- 1...Rb5!
- threat
- 1.Qd2?
- threat
- 2.Se3#
- 1...Sd8+
- 2.Rxd8#
- 1...Rxc4
- 2.Bb7#
- 1...Sxd4
- 2.Qxd4#
- 1...Sxc5
- 2.dxc5#
- 1...bxc5!
- threat
- 1.Qe2?
- threat
- 2.Bb7#
- 2.Qe4#
- 2.Qxe6#
- 1...Sd8+
- 2.Rxd8#
- 1...Sxd4
- 2.Qe4#
- 1...bxc5
- 2.Qe4#
- 2.Qxe6#
- 1...Rb5
- 2.Bb7#
- 2.Qxe6#
- 1...Sf4
- 2.Bb7#
- 2.Rd8#
- 2.Qe4#
- 1...Sc7
- 2.Bb7#
- 2.Rd8#
- 2.Qe4#
- 1...Sg7
- 2.Bb7#
- 2.Rd8#
- 2.Qe4#
- 1...Sf8
- 2.Bb7#
- 2.Qe4#
- 1...b5
- 2.Sb6#
- 2.Bb7#
- 2.Qxe6#
- 1...f5
- 2.Bb7#
- 2.Qe5#
- 2.Qxe6#
- 1...Sxc5!
- threat
- 1.Kxe7?
- Keys
- 1.cxb6!
- threat
- 2.Bb7#
- 1...Sd8+
- 2.Rxd8#
- 1...Rxc4
- 2.Bxc4#
- 1...Rxb6
- 2.Sxb6#
- 1...Sxd4
- 2.Se3#
- 1...Sc5
- 2.Rxc5#
- 1...Sc7
- 2.Rd8#
- threat
- 1.cxb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- R(c);N_GUARD::S(D),XP(f)
- R(c);SBLOCK,XS(D)::B(G)
- S(g);SBLOCK,XP(E)::S(D)
- S(g);N_GUARD::R(J)
- S(g);CHECK,N_GUARD::R(J),XS(g)
- P(f);S_CUTR(c)::S(D)
- P(h);N_GUARD::QAR1(B)
- Tries
- Try
- K(H);P-FLIGHT,XP(i)
- Threat
- QAR1(B)
- Vars
- P(f);S_CUTR(c)::S(D)
- S(g);N_GUARD::R(J)
- Refutation
- R(c);
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- R(c);XS(D)::S(I),XP(i)
- R(c);::S(D)
- Refutation
- S(g);CHECK
- Try
- B(G);
- Threat
- S(D),XP(f)
- Vars
- S(g);CHECK,N_GUARD::R(J),XS(g)
- R(c);SBLOCK,XS(D)::B(G)
- P(f);XP(F)::S(D)
- Refutation
- R(c);XB(G)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- S(g);CHECK,N_GUARD::R(J),XS(g)
- S(g);N_GUARD,XQ(B)::R(J)
- S(g);XP(F)::S(D)
- R(c);::S(D)
- Refutation
- P(e);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- S(g);XP(F)::QAB1(B)
- S(g);N_GUARD,XQ(B)::R(J)
- P(f);S_CUTR(c)::S(D)
- Refutation
- R(c);
- Try
- Q(B);
- Threat
- S(D)
- Vars
- S(g);CHECK,N_GUARD::R(J),XS(g)
- R(c);SBLOCK,XS(D)::B(G)
- S(g);OGATE,P_SPINS(g),XP(E)::QAR1(B),XS(g)
- S(g);OGATE,XP(F)::QAR(B)+P(E),XS(g)
- Refutation
- P(f);XP(F)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- S(g);CHECK,N_GUARD::R(J),XS(g)
- S(g);XP(E)::QAB1(B)
- Refutation
- S(g);XP(F)
- Try
- Actual
- P(F);XP(f)
- Threat
- B(G)
- Vars
- S(g);CHECK,N_GUARD::R(J),XS(g)
- R(c);OGATE,XS(D)::B(G),XR(c)
- R(c);XP(F)::S(D),XR(c)
- S(g);SBLOCK,XP(E)::S(D)
- S(g);N_GUARD::R1(J),XS(g)
- S(g);N_GUARD::R(J)
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