MESON Chess Problem Database
Problem Display
PID: 185271 (B7/4B2n/1p1rp1n1/1pbrk3/6P1/1P2NQP1/2N1RK2/8 w - - 0 1)
Evans, TC
The Observer, 1930
(First published on Sun Dec 21 1930)
#2
10 + 9
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Qe4#
- 1...Rd2
- 2.Qe4#
- 1...Rd3
- 2.Qe4#
- 1...Rd4
- 2.Sc4#
- 1...Ba3
- 2.Sd1#
- 2.Sf1#
- 2.Sg2#
- 2.Sc4#
- 2.Sxd5#
- 2.Sf5#
- 1...Bxe3+
- 2.Rxe3#
- 2.Qxe3#
- 1...Bb4
- 2.Sd1#
- 2.Sf1#
- 2.Sg2#
- 2.Sc4#
- 2.Sxd5#
- 2.Sf5#
- 1...Sf4
- 2.Qxf4#
- 2.gxf4#
- 1...Sh4
- 2.Qf4#
- 1...Sxe7
- 2.Qf4#
- 1...Sgf8
- 2.Qf4#
- 1...Sh8
- 2.Qf4#
- 1...Sg5
- 2.Bf6#
- 1...Sf6
- 2.Bxf6#
- 1...Shf8
- 2.Bf6#
- 1...Rd1
- Tries
- 1.Kf1?
- threat
- 2.Sc4#
- 1...Bxe3
- 2.Rxe3#
- 2.Qxe3#
- 1...Rd1+!
- threat
- 1.Kg2?
- threat
- 2.Sc4#
- 1...Sf4+
- 2.Qxf4#
- 2.gxf4#
- 1...Bxe3
- 2.Rxe3#
- 2.Qxe3#
- 1...Sh4+!
- threat
- 1.Sd4?
- threat
- 2.Sec2#
- 2.Sef5#
- 1...Kxd4
- 2.Sc2#
- 1...Rxd4
- 2.Sc4#
- 1...Sxe7
- 2.Sec2#
- 2.Qf4#
- 1...Sf4
- 2.Qxf4#
- 1...Sg5
- 2.Bf6#
- 1...Sf6
- 2.Bxf6#
- 1...Bxd4!
- threat
- 1.Bxd5?
- threat
- 2.Qe4#
- 1...Bxe3+
- 2.Rxe3#
- 1...Sxe7
- 2.Qf4#
- 1...exd5
- 2.Qf5#
- 1...Sg5
- 2.Bf6#
- 2.Qf6#
- 1...Sf6
- 2.Bxf6#
- 2.Qxf6#
- 1...Rxd5!
- threat
- 1.Kf1?
- Keys
- 1.Sb4!
- 1...Bxe3+
- 2.Qxe3#
- 1...Kd4
- 2.Sec2#
- 1...Bxb4
- 2.Sc2#
- 2.Sf5#
- 1...Sxe7
- 2.Qf4#
- 1...Rc6
- 2.Sxc6#
- 1...Rd1
- 2.Qe4#
- 1...Rd2
- 2.Qe4#
- 1...Rd3
- 2.Qe4#
- 1...Rd4
- 2.Sc4#
- 1...Rd7
- 2.Sc6#
- 1...Rd8
- 2.Sc6#
- 1...Bd4
- 2.Sd3#
- 1...Sf4
- 2.Qxf4#
- 1...Sh4
- 2.Qf4#
- 1...Sgf8
- 2.Qf4#
- 1...Sh8
- 2.Qf4#
- 1...Sg5
- 2.Bf6#
- 1...Sf6
- 2.Bxf6#
- 1...Shf8
- 2.Bf6#
- 1...Bxe3+
- 1.Sb4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- R(c);::QAR1(F)
- R(c);P_PINR(B)::QAR1(F)
- R(c);N_PINS(E)::R(B)+S(E),DCHECK
- S(h);N_GUARD::QAB1(F)
- S(h);N_GUARD,XB(I)::QAB1(F)
- S(i);N_GUARD::B(I)
- S(i);N_GUARD::B(I),XS(i)
- Tries
- Try
- K(C);N_SPINS(E),P-FLIGHT
- Threat
- R(B)+S(E),DCHECK
- Refutation
- R(c);CHECK
- Try
- K(C);N_SPINS(E),P-FLIGHT
- Threat
- R(B)+S(E),DCHECK
- Refutation
- S(h);CHECK
- Try
- S(A);N_SPINS(E)
- Threat
- DUALS(2)
- Vars
- K(d);S_FLIGHT,XS(A)::S(E)
- R(c);SBLOCK,XS(A)::R(B)+S(E),DCHECK
- S(h);N_GUARD::QAB1(F),XS(h)
- S(i);N_GUARD::B(I)
- S(i);N_GUARD::B(I),XS(i)
- Refutation
- B(b);P_PINS(E),XS(A)
- Try
- B(J);XR(c)
- Threat
- QAR1(F)
- Vars
- B(b);CHECK,OGATE,P_SPINB(b),XS(E)::R(B),XB(b)
- S(h);N_GUARD,XB(I)::QAB1(F)
- P(g);N_GUARD,XB(J)::QAR1(F)
- Refutation
- R(f);XB(J)
- Try
- Actual
- S(A);
- Vars
- B(b);CHECK,OGATE,P_SPINB(b),XS(E)::QAR2(F),XB(b)
- K(d);N_PINS(E),S_FLIGHT::S(E)
- S(h);N_GUARD,XB(I)::QAB1(F)
- R(f);N_GUARD::S(A),XR(f)
- R(c);::QAR1(F)
- R(c);P_PINR(B)::QAR1(F)
- R(c);N_PINS(E),SBLOCK::R(B)+S(E),DCHECK
- R(f);N_GUARD::S(A)
- B(b);SBLOCK,S_CUTR(c)::S(A)
- S(h);N_GUARD::QAB1(F),XS(h)
- S(h);N_GUARD::QAB1(F)
- S(i);N_GUARD::B(I)
- S(i);N_GUARD::B(I),XS(i)
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