MESON Chess Problem Database

Problem Display
PID: 17503 (4R3/B4p2/2N5/5B1N/8/1Rb2kp1/K1Qn2r1/1n3b2 w - - 0 1)

Hassberg, Eric Manfred

Echec et Mat, 1947

4R3/B4p2/2N5/5B1N/8/1Rb2kp1/K1Qn2r1/1n3b2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Se5#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Sxb3
      • 2.Re3#
    • 1...Sc4
      • 2.Sd4#
    • 1...Se4
      • 2.Se5#
  • Tries
    • 1.Rxc3+?
      • 1...Bd3
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Sxc3+!
    • 1.Qd1+?
      • 1...Be2
        • 2.Se5#
      • 1...Re2!
    • 1.Qxc3+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sxc3+!
  • Keys
    • 1.Bh3!
      • threat
        • 2.Qf5#
      • 1...Sxb3
        • 2.Re3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Sd4#
      • 1...Se4
        • 2.Se5#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(b);SBLOCK::S(F)
    • B(b);N_GUARD,N_SPINB(e)::QAR2(B),XB(b)
    • S(c);N_SPINB(e),P_PINQ(B),XR(C)::R1(H)
    • S(c);P_PINQ(B)::S(F)
  • Tries
    • Try
      • R(C);CHECK,XB(e)
      • Refutation
        • S(a);CHECK,XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • B(b);N_SPINB(e),P_SPINB(b)::S(F)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(B);CHECK,XB(e)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR2(B),XB(b)
      • Refutation
        • S(a);CHECK,P_SPINS(a),XQ(B)
  • Actual
    • B(D);
    • Threat
      • QAR2(B)
    • Vars
      • S(c);N_SPINB(e),P_PINQ(B),XR(C)::R1(H)
      • B(b);N_GUARD,N_SPINB(e)::QAR2(B),XB(b)
      • S(c);P_PINQ(B)::S(F)
      • P(h);::QAR2(B),XP(h)
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