MESON Chess Problem Database
Problem Display
PID: 78495 (4R3/b3q3/3r1n2/6Qp/2N1kNb1/2P2RP1/5p1K/5B2 w - - 0 1)
Ekstrom, Sven Johan Adrian
Jonsson, Nils Gustav Helmer
Schackvarlden, 1944
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Kxf3
- 2.Bg2#
- 1...Rd2
- 2.Sxd2#
- 1...Rd4
- 2.Re3#
- 1...Ra6
- 2.Sd2#
- 1...Rb6
- 2.Sd2#
- 2.Re3#
- 1...Rc6
- 2.Sd2#
- 1...Re6
- 2.Sd2#
- 1...Bxf3
- 2.Qg6#
- 1...Be3
- 2.Rxe3#
- 1...Bd4
- 2.Sd2#
- 1...Bb8
- 2.Re3#
- 1...Sd5
- 2.Sd2#
- 1...Kxf3
- Tries
- 1.Sg2?
- threat
- 2.Rf4#
- 1...Kxf3
- 2.Qf4#
- 1...Bxf3
- 2.Sxd6#
- 1...Bf5
- 2.Qxf5#
- 1...Be3
- 2.Rxe3#
- 1...Sd5
- 2.Sd2#
- 1...Qe5!
- threat
- 1.Sd3?
- threat
- 2.Sd2#
- 2.Rf4#
- 1...Kxf3
- 2.Sd2#
- 2.Qf4#
- 1...Rxd3
- 2.Rf4#
- 1...Bxf3
- 2.Sd2#
- 2.Sxd6#
- 1...Bf5
- 2.Qxf5#
- 1...Be3
- 2.Rxe3#
- 1...Sd5
- 2.Sd2#
- 1...Qe5!
- threat
- 1.Sh3?
- threat
- 2.Rf4#
- 1...Kxf3
- 2.Qf4#
- 1...Bxf3
- 2.Sxd6#
- 1...Bf5
- 2.Qxf5#
- 1...Be3
- 2.Rxe3#
- 1...Sd5
- 2.Sd2#
- 1...Qe5!
- threat
- 1.Sd5?
- threat
- 2.Sd2#
- 2.Rf4#
- 1...Kxf3
- 2.Sd2#
- 2.Qf4#
- 1...Rxd5
- 2.Rf4#
- 2.Qf4#
- 1...Bxf3
- 2.Sd2#
- 2.Sxd6#
- 1...Sxd5
- 2.Sd2#
- 1...Bf5
- 2.Qxf5#
- 1...Be3
- 2.Rxe3#
- 1...Qe5!
- threat
- 1.Sg6?
- threat
- 2.Rf4#
- 1...Kxf3
- 2.Qf4#
- 1...Bxf3
- 2.Sxd6#
- 1...Bf5
- 2.Qxf5#
- 1...Be3
- 2.Rxe3#
- 1...Sd5
- 2.Sd2#
- 1...Qe5!
- threat
- 1.Bg2?
- threat
- 2.Sxd6#
- 2.Re3#
- 1...Bxf3
- 2.Qg6#
- 1...Sxe8
- 2.Re3#
- 1...Rd1
- 2.Re3#
- 1...Rd2
- 2.Sxd2#
- 2.Re3#
- 1...Rd3
- 2.Re3#
- 1...Rd4
- 2.Re3#
- 1...Rd5
- 2.Re3#
- 1...Ra6
- 2.Sd2#
- 2.Re3#
- 1...Rb6
- 2.Sd2#
- 2.Re3#
- 1...Rc6
- 2.Sd2#
- 2.Re3#
- 1...Re6
- 2.Sd2#
- 2.Re3#
- 1...Rd7
- 2.Re3#
- 1...Rd8
- 2.Re3#
- 1...Bf5
- 2.Rxf2#
- 2.Rd3#
- 2.Re3#
- 1...Be6
- 2.Rxf2#
- 2.Rd3#
- 2.Re3#
- 2.Qe5#
- 1...Be3
- 2.Sxd6#
- 2.Rxe3#
- 1...Bc5
- 2.Re3#
- 1...Bb8
- 2.Re3#
- 1...f1S+!
- threat
- 1.Rd3?
- threat
- 2.Sd2#
- 2.Sxd6#
- 1...Sxe8
- 2.Sd2#
- 1...Be3
- 2.Rxe3#
- 1...Rd4
- 2.Sd2#
- 2.Re3#
- 1...Rd5
- 2.Sd2#
- 1...Ra6
- 2.Sd2#
- 1...Rb6
- 2.Sd2#
- 2.Re3#
- 1...Rc6
- 2.Sd2#
- 1...Re6
- 2.Sd2#
- 1...Rd7
- 2.Sd2#
- 1...Rd8
- 2.Sd2#
- 1...Bf5
- 2.Bg2#
- 1...Be6
- 2.Sd2#
- 2.Bg2#
- 2.Qe5#
- 1...Bc5
- 2.Sd2#
- 1...Bb8
- 2.Sd2#
- 2.Re3#
- 1...Rxd3!
- threat
- 1.Rxe7+?
- 1...Kxf3
- 2.Be2#
- 2.Bg2#
- 1...Re6
- 2.Sd2#
- 1...Be6!
- 1...Kxf3
- 1.Qe5+?
- 1...Kxf3
- 2.Be2#
- 2.Bg2#
- 1...Qxe5!
- 1...Kxf3
- 1.Qg6+?
- 1...Kxf3
- 2.Bg2#
- 1...Bf5!
- 1...Kxf3
- 1.Sg2?
- Keys
- 1.Se6!
- threat
- 2.Rf4#
- 1...Kxf3
- 2.Qf4#
- 1...Bxf3
- 2.Qe5#
- 1...Bf5
- 2.Qxf5#
- 1...Be3
- 2.Rxe3#
- 1...Sd5
- 2.Sd2#
- threat
- 1.Se6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- K(b);N_SPINQ(h),OGATEB,S_FLIGHT,XR(D)::B(A)
- R(e);N_GUARD::S(F),XR(e)
- R(e);S_CUTB(g)::R1(D)
- R(e);N_GUARD::S(F)
- R(e);N_GUARD,N_SPINQ(h)::S(F)
- B(c);N_GUARD,SBLOCK,XR(D)::QAB(H)
- B(g);N_GUARD::R1(D),XB(g)
- B(g);S_CUTR(e)::S(F)
- B(g);N_GUARD::R1(D)
- S(f);S_CUTR(e)::S(F)
- Tries
- Try
- S(G);
- Threat
- R1(D)
- Vars
- K(b);N_SPINQ(h),S_FLIGHT,XR(D)::QAR1(H)
- B(c);SBLOCK,XR(D)::S(F),XR(e)
- B(c);N_GUARD::QAB1(H),XB(c)
- B(g);N_GUARD::R1(D),XB(g)
- S(f);S_CUTR(e)::S(F)
- Refutation
- Q(h);P_PINP(E)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(e);XS(G)::R1(D)
- B(c);N_GUARD::QAB1(H),XB(c)
- B(g);N_GUARD::R1(D),XB(g)
- S(f);::S(F)
- Refutation
- Q(h);P_PINP(E)
- Try
- S(G);
- Threat
- R1(D)
- Vars
- K(b);N_SPINQ(h),S_FLIGHT,XR(D)::QAR1(H)
- B(c);SBLOCK,XR(D)::S(F),XR(e)
- B(c);N_GUARD::QAB1(H),XB(c)
- B(g);N_GUARD::R1(D),XB(g)
- S(f);S_CUTR(e)::S(F)
- Refutation
- Q(h);P_PINP(E)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- S(f);XS(G)::S(F)
- B(c);N_GUARD::QAB1(H),XB(c)
- B(g);N_GUARD::R1(D),XB(g)
- Refutation
- Q(h);P_PINP(E)
- Try
- S(G);
- Threat
- R1(D)
- Vars
- K(b);N_SPINQ(h),S_FLIGHT,XR(D)::QAR1(H)
- B(c);SBLOCK,XR(D)::S(F),XR(e)
- B(c);N_GUARD::QAB1(H),XB(c)
- B(g);N_GUARD::R1(D),XB(g)
- S(f);S_CUTR(e)::S(F)
- Refutation
- Q(h);P_PINP(E)
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD,P_SPINB(c),XR(D)::QAB(H)
- S(f);N_SPINQ(h),XR(I)::B(A)+R(D),DCHECK
- R(e);::B(A)+R(D),DCHECK
- B(g);::B(A)+R(D),DCHECK
- Refutation
- P(a);CHECK
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- S(f);N_SPINQ(h),XR(I)::S(F)
- B(g);N_GUARD::R1(D),XB(g)
- R(e);::S(F)
- R(e);N_SPINQ(h)::S(F)
- B(c);N_GUARD::B(A)
- B(g);::S(F)
- Refutation
- R(e);XR(D)
- Try
- R(I);CHECK,XQ(h)
- Vars
- R(e);P_SPINR(e)::S(F)
- Refutation
- B(c);P_SPINB(c)
- Try
- Q(H);CHECK,N_PINQ(h)
- Refutation
- Q(h);P_SPINQ(h),XQ(H)
- Try
- Q(H);CHECK
- Vars
- K(b);N_SPINQ(h),S_FLIGHT,XR(D)::B(A)
- Refutation
- B(c);P_SPINB(c)
- Try
- Actual
- S(G);N_PINQ(h)
- Threat
- R1(D)
- Vars
- K(b);S_FLIGHT,XR(D)::QAR1(H)
- B(c);SBLOCK,XR(D)::QAR1(H)
- B(c);N_GUARD::QAB1(H),XB(c)
- B(g);N_GUARD::R1(D),XB(g)
- S(f);S_CUTR(e)::S(F)
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