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Problem Display

PID: 83642 (8/B2p4/B7/2r1N1K1/3kPP2/Rb4Rp/1n1N1P2/br4Q1 w - - 0 1)

Ellerman, Arnoldo

British Chess Magazine, 1936

8/B2p4/B7/2r1N1K1/3kPP2/Rb4Rp/1n1N1P2/br4Q1

#2

11 + 8

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...Bd1
  - 2.f3#
- 1...Bd5
  - 2.Sef3#
- 1...Sd1
  - 2.Rd3#
- 1...Sd3
  - 2.Rxd3#
- 1...Sa4
  - 2.Rd3#
- 1...Sc4
  - 2.Rd3#
- 1...d5
  - 2.Sc6#
Tries
- 1.Kf5?
  - threat
    - 2.Sxb3#
  - 1...Sd3
    - 2.Rxd3#
  - 1...Bd1
    - 2.f3#
  - 1...Ba2
    - 2.Sf3#
  - 1...Bc2
    - 2.Sf3#
  - 1...Ba4
    - 2.Sf3#
  - 1...Bc4
    - 2.Sf3#
  - 1...Bd5
    - 2.Sdf3#
    - 2.Sef3#
  - 1...Bf7
    - 2.Sf3#
  - 1...Bg8
    - 2.Sf3#
  - 1...Sd1
    - 2.Rd3#
  - 1...Sa4
    - 2.Rd3#
  - 1...Sc4
    - 2.Rd3#
  - 1...Be6+!
- 1.Qe1?
  - threat
    - 2.Sxb3#
    - 2.Sf3#
    - 2.Qe3#
  - 1...Sd3
    - 2.Sf3#
    - 2.Rxd3#
  - 1...Bd1
    - 2.Qe3#
  - 1...Ba2
    - 2.Sf3#
    - 2.Qe3#
  - 1...Bc2
    - 2.Sf3#
    - 2.Qe3#
  - 1...Ba4
    - 2.Sf3#
    - 2.Qe3#
  - 1...Bc4
    - 2.Sf3#
    - 2.Qe3#
  - 1...Bd5
    - 2.Sdf3#
    - 2.Sef3#
    - 2.Qe3#
  - 1...Be6
    - 2.Sf3#
    - 2.Qe3#
  - 1...Bf7
    - 2.Sf3#
    - 2.Qe3#
  - 1...Bg8
    - 2.Sf3#
    - 2.Qe3#
  - 1...Sd1
    - 2.Sf3#
    - 2.Rd3#
  - 1...Sa4
    - 2.Sf3#
    - 2.Rd3#
    - 2.Qe3#
  - 1...Sc4
    - 2.Sf3#
    - 2.Rd3#
  - 1...Rxe1!
Keys
- 1.Bb7!
  - threat
    - 2.Sxb3#
  - 1...Sd3
    - 2.Rxd3#
  - 1...Bd1
    - 2.f3#
  - 1...Ba2
    - 2.Sf3#
  - 1...Bc2
    - 2.Sf3#
  - 1...Ba4
    - 2.Sf3#
  - 1...Bc4
    - 2.Sf3#
  - 1...Bd5
    - 2.Sef3#
  - 1...Be6
    - 2.Sf3#
  - 1...Bf7
    - 2.Sf3#
  - 1...Bg8
    - 2.Sf3#
  - 1...Sd1
    - 2.Rd3#
  - 1...Sa4
    - 2.Rd3#
  - 1...Sc4
    - 2.Rd3#
  - 1...d5
    - 2.Sc6#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
Sets
- B(d);S_CUTR(b)::QAB(A)+P(C)
- B(d);N_PINS(H)::S(H)
- S(c);N_GUARD::R1(E)
- S(c);N_GUARD::R1(E),XS(c)
- P(h);N_PINS(H)::S(H)
Tries
- Try
  - K(I);P-FLIGHT
  - Threat
    - S(B),XB(d)
  - Vars
    - S(c);N_GUARD::R1(E),XS(c)
    - B(d);S_CUTR(b)::QAB(A)+P(C)
    - B(d);::S(B)
    - B(d);P_PINP(F)::S(B)
    - S(c);N_GUARD::R1(E)
  - Refutation
    - B(d);CHECK
- Try
  - Q(A);
  - Threat
    - DUALS(3)
  - Vars
    - B(d);::QAB1(A)
  - Refutation
    - R(b);XQ(A)
Actual
- B(J);
- Threat
  - S(B),XB(d)
- Vars
  - S(c);N_GUARD::R1(E),XS(c)
  - B(d);S_CUTR(b)::QAB(A)+P(C)
  - B(d);::S(B)
  - B(d);N_PINS(H)::S(H)
  - S(c);N_GUARD::R1(E)
  - P(h);N_PINS(H)::S(H)

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