MESON Chess Problem Database
Problem Display
PID: 239757 (qQ6/2N5/3r2B1/p7/R1N1rkPK/R2p4/1B1PP3/8 w - - 0 1)
Navon, Emanuel
Witztum, Menachem
Variantim, 2009
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Sxd5#
- 1...Qa6
- 2.Sd5#
- 1...Qa7
- 2.Sd5#
- 1...Re3
- 2.dxe3#
- 1...Rxc4
- 2.Se6#
- 1...Red4
- 2.Se6#
- 1...Re5
- 2.Bxe5#
- 1...Ree6
- 2.Sxe6#
- 1...Rdd4
- 2.Sd5#
- 2.Se6#
- 1...Rd5
- 2.Sxd5#
- 2.Se6#
- 1...Ra6
- 2.Sd5#
- 2.Se6#
- 1...Rb6
- 2.Sd5#
- 2.Se6#
- 1...Rc6
- 2.Sd5#
- 2.Se6#
- 1...Rde6
- 2.Sd5#
- 2.Sxe6#
- 1...Rf6
- 2.Sd5#
- 2.Se6#
- 1...Rxg6
- 2.Sd5#
- 2.Se6#
- 1...Rd7
- 2.Sd5#
- 2.Se6#
- 1...Rd8
- 2.Sd5#
- 2.Se6#
- 1...Qd5
- Tries
- 1.Se3?
- threat
- 2.Sg2#
- 2.Se6#
- 1...Qxb8
- 2.Sg2#
- 2.Rxe4#
- 1...Rxa4
- 2.Se6#
- 1...dxe2
- 2.Sg2#
- 1...Rdd4
- 2.Scd5#
- 2.Se6#
- 1...Qd5
- 2.Sg2#
- 2.Scxd5#
- 1...Rb4
- 2.Se6#
- 1...Rc4
- 2.Se6#
- 1...Re6
- 2.Sg2#
- 2.Scd5#
- 2.Sxe6#
- 1...Red4!
- threat
- 1.Sxa5?
- threat
- 2.Se6#
- 1...Qxb8
- 2.Rxe4#
- 1...Qd5
- 2.Sxd5#
- 1...Re6
- 2.Sd5#
- 2.Sxe6#
- 1...Red4!
- threat
- 1.Sb6?
- threat
- 2.Se6#
- 1...Qxb8
- 2.Rxe4#
- 1...Qd5
- 2.Scxd5#
- 1...Re6
- 2.Scd5#
- 2.Sxe6#
- 1...Red4!
- threat
- 1.Sxd6?
- threat
- 2.Se6#
- 1...Qd5
- 2.Sxd5#
- 1...Rd4!
- threat
- 1.Bf6?
- threat
- 2.Bg5#
- 1...Rxc4
- 2.Se6#
- 1...Rxf6
- 2.Sd5#
- 2.Se6#
- 1...Qd5
- 2.Sxd5#
- 1...Re5
- 2.Bxe5#
- 1...Rd5
- 2.Sxd5#
- 2.Se6#
- 1...Rxe2!
- threat
- 1.Bg7?
- threat
- 2.Bh6#
- 1...Rxc4
- 2.Se6#
- 1...Rxg6
- 2.Sd5#
- 2.Se6#
- 1...Qd5
- 2.Sxd5#
- 1...Re5
- 2.Bxe5#
- 1...Rd5
- 2.Sxd5#
- 2.Se6#
- 1...Rxe2!
- threat
- 1.Qxa8?
- threat
- 2.Qxe4#
- 1...Rxc4
- 2.Qf3#
- 2.e3#
- 1...Rxg6
- 2.Sd5#
- 1...Re3
- 2.dxe3#
- 1...Red4
- 2.Qf3#
- 2.e3#
- 1...Re5
- 2.Bxe5#
- 2.Qf3#
- 1...Ree6
- 2.Qf3#
- 1...Re7
- 2.Qf3#
- 1...Re8
- 2.Qf3#
- 1...Rdd4
- 2.Qf8#
- 1...Rd5
- 2.Sxd5#
- 1...Rc6
- 2.Sd5#
- 1...Rde6
- 2.Sd5#
- 1...Rxe2!
- threat
- 1.Qf8+?
- 1...Rf6
- 2.Qh6#
- 2.Qxf6#
- 1...Qxf8!
- 1...Rf6
- 1.Se3?
- Keys
- 1.Se5!
- threat
- 2.e3#
- 1...dxe2
- 2.Rf3#
- 1...Red4
- 2.Sxd3#
- 1...Rdd4
- 2.Se6#
- 1...Qa7
- 2.Rxe4#
- threat
- 1.Se5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(f);N_GUARD::S(J),XQ(f)
- Q(f);N_GUARD::S(J)
- R(b);OGATE::P(B),XR(b)
- R(b);N_GUARD,P_SPINR(b),XS(F)::S(J)
- R(b);N_GUARD::S(J)
- R(b);N_GUARD::B(A),XR(b)
- R(b);N_GUARD::S(J),XR(b)
- Tries
- Try
- S(F);P_PINR(b)
- Threat
- DUALS(2)
- Vars
- R(b);N_SPINR(b),XR(E)::S(J)
- P(a);XP(C)::S(F)
- R(b);::S(J)
- Refutation
- R(b);
- Try
- S(F);P_PINR(b),XP(d)
- Threat
- S(J)
- Vars
- Q(f);N_GUARD,XQ(K)::R1(E),XR(b)
- Q(f);N_GUARD::S(J),XQ(f)
- Refutation
- R(b);
- Try
- S(F);P_PINR(b)
- Threat
- S(J)
- Vars
- Q(f);N_GUARD,XQ(K)::R1(E),XR(b)
- Q(f);N_GUARD::S(J),XQ(f)
- Refutation
- R(b);
- Try
- S(F);P_PINR(b),XR(e)
- Threat
- S(J)
- Vars
- Q(f);N_GUARD::S(J),XQ(f)
- Refutation
- R(b);
- Try
- B(A);
- Threat
- B(A)
- Vars
- R(b);N_GUARD,P_SPINR(b),XS(F)::S(J)
- Q(f);N_GUARD::S(J),XQ(f)
- R(b);N_GUARD::B(A),XR(b)
- Refutation
- R(b);XP(C)
- Try
- B(A);
- Threat
- B(A)
- Vars
- R(b);N_GUARD,P_SPINR(b),XS(F)::S(J)
- Q(f);N_GUARD::S(J),XQ(f)
- R(b);N_GUARD::B(A),XR(b)
- Refutation
- R(b);XP(C)
- Try
- Q(K);XQ(f)
- Threat
- QAR1(K),XR(b)
- Vars
- R(e);N_GUARD,XB(I)::S(J)
- R(b);OGATE::P(B),XR(b)
- R(b);OGATE::QAR1(K)
- R(e);N_GUARD::QAR(K)
- R(e);N_GUARD::S(J),XR(e)
- R(e);N_GUARD::S(J)
- Refutation
- R(b);XP(C)
- Try
- Q(K);CHECK
- Refutation
- Q(f);XQ(K)
- Try
- Actual
- S(F);P_PINR(b)
- Threat
- P(C)
- Vars
- P(a);OGATE,XP(C)::R1(D)
- R(b);S_CUTR(e)::S(F),XP(a)
- R(e);N_GUARD,N_SPINR(b)::S(J)
- Q(f);N_GUARD::R1(E),XR(b)
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