MESON Chess Problem Database

Problem Display
PID: 124588 (2N2BB1/2b2n2/3p1p2/n4R2/3kP2R/r4P2/bP1NPP1K/3Q4 w - - 0 1)

Shedey, Sergey Oleksandrovich

64 Shakhmatnoe obozrenie, 1974

2N2BB1/2b2n2/3p1p2/n4R2/3kP2R/r4P2/bP1NPP1K/3Q4

#2

13 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Rd5#
    • 1...Bb1
      • 2.Rd5#
    • 1...Bc4
      • 2.Sb3#
    • 1...Bd5
      • 2.Rxd5#
    • 1...Sb3
      • 2.Rd5#
    • 1...Sc4
      • 2.Sb3#
      • 2.Rd5#
    • 1...Se5
      • 2.Sb3#
    • 1...Sg5
      • 2.Sb3#
    • 1...Sh6
      • 2.Sb3#
    • 1...Sd8
      • 2.Sb3#
    • 1...Sh8
      • 2.Sb3#
    • 1...d5+
      • 2.e5#
  • Tries
    • 1.Sb1+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kc4!
    • 1.Sf1+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kc4!
    • 1.Sc4+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Kxc4!
    • 1.Qa4+?
      • 1...Bc4
        • 2.Rd5#
      • 1...Sc4
        • 2.Rd5#
      • 1...Rxa4!
  • Keys
    • 1.Sa7!
      • threat
        • 2.Sb5#
      • 1...d5+
        • 2.e5#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Se5
        • 2.Sb3#
      • 1...Rb3
        • 2.Rd5#
      • 1...Bc4
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(b);S_CUTB(a)::R1(J)
    • B(a);N_GUARD::R1(J)
    • B(a);SBLOCK::QAR(A)+S(C),DCHECK
    • B(a);N_GUARD::R1(J),XB(a)
    • S(d);S_CUTB(a)::R1(J)
    • S(h);::QAR(A)+S(C),DCHECK
    • P(e);CHECK,SBLOCK::R(I)+P(H)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(A),XR(b)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(h)
    • Try
      • S(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(A),XR(b)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(h)
    • Try
      • S(C);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(A),XR(b)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(h),XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);P_SPINB(a)::R1(J)
        • S(d);P_SPINS(d)::R1(J)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • S(K);
    • Threat
      • S(K)
    • Vars
      • P(e);CHECK,SBLOCK::R(I)+P(H)
      • B(a);N_GUARD::R1(J),XB(a)
      • S(h);::QAR(A)+S(C),DCHECK
      • R(b);S_CUTB(a)::R1(J)
      • B(a);SBLOCK::QAR(A)+S(C),DCHECK
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